/* =========================================================================
   孤单障碍 · GUDAN ZHANG'AI
   Fluent / WinUI 3 蓝白极简主题 · 设计系统
   -------------------------------------------------------------------------
   参考对标：championos.cn 的信息架构
   视觉语言：Windows 11 / WinUI 3（Mica 底、亚克力卡、8px 圆角、Fluent 曲线）
   ========================================================================= */

/* ---------------------------------------------------------------- Tokens */
:root {
  /* —— 品牌色（Windows 11 系统蓝） —— */
  --accent:            #0067C0;
  --accent-hover:      #005BAB;
  --accent-pressed:    #004E93;
  --accent-text:       #005FB8;
  --accent-soft:       #E8F2FC;
  --accent-soft-2:     #D7E9FA;
  --accent-ring:       rgba(0, 103, 192, .18);

  /* —— 中性色（WinUI 层级） —— */
  --bg:                #F3F5F9;
  --bg-mica:           #FAFBFD;
  --layer-1:           #FFFFFF;
  --layer-2:           #F7F9FC;
  --layer-3:           #EFF3F8;
  --stroke:            rgba(16, 32, 56, .08);
  --stroke-strong:     rgba(16, 32, 56, .14);
  --divider:           #E4EAF2;

  --text-1:            #14171C;
  --text-2:            #4A545F;
  --text-3:            #7A8694;
  --text-4:            #A5AFBB;

  /* —— 状态色 —— */
  --ok:                #0F7B4F;
  --warn:              #9A6700;
  --danger:            #C42B1C;

  /* —— 阴影（WinUI 双段阴影） —— */
  --shadow-2:  0 1px 2px rgba(16, 32, 56, .06), 0 2px 8px rgba(16, 32, 56, .05);
  --shadow-4:  0 2px 4px rgba(16, 32, 56, .06), 0 8px 20px rgba(16, 32, 56, .07);
  --shadow-8:  0 4px 8px rgba(16, 32, 56, .06), 0 18px 40px rgba(16, 32, 56, .10);
  --shadow-accent: 0 8px 28px rgba(0, 103, 192, .26);

  /* —— 圆角 —— */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;   /* WinUI 标准控件圆角 */
  --r-lg: 12px;
  --r-xl: 16px;
  --r-2xl: 24px;
  --r-pill: 999px;

  /* —— Fluent 动效曲线 —— */
  --ease-standard: cubic-bezier(.8, 0, .2, 1);
  --ease-decel:    cubic-bezier(.1, .9, .2, 1);
  --ease-accel:    cubic-bezier(.7, 0, 1, .5);
  --ease-spring:   cubic-bezier(.22, 1.2, .36, 1);

  /* —— 排版 —— */
  --font-ui: "Segoe UI Variable Display", "Segoe UI", "Noto Sans SC",
             "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  --font-num: "Segoe UI Variable Display", "Segoe UI", "Bahnschrift",
              "DIN Alternate", ui-sans-serif, sans-serif;

  /* —— 栅格 —— */
  --max: 1200px;
  --gutter: clamp(20px, 5vw, 48px);
  --section-y: clamp(64px, 7.6vw, 116px);

  color-scheme: light;
}

:root[data-theme="dark"] {
  --accent:            #4CC2FF;
  --accent-hover:      #6FD0FF;
  --accent-pressed:    #3AAEE8;
  --accent-text:       #7FD3FF;
  --accent-soft:       rgba(76, 194, 255, .13);
  --accent-soft-2:     rgba(76, 194, 255, .22);
  --accent-ring:       rgba(76, 194, 255, .26);

  --bg:                #0E1319;
  --bg-mica:           #121820;
  --layer-1:           #171E27;
  --layer-2:           #1B232E;
  --layer-3:           #212B37;
  --stroke:            rgba(255, 255, 255, .09);
  --stroke-strong:     rgba(255, 255, 255, .16);
  --divider:           #232D39;

  --text-1:            #F2F5F9;
  --text-2:            #B7C1CD;
  --text-3:            #8B96A3;
  --text-4:            #6B7683;

  --ok:                #54D08A;
  --warn:              #F0C674;
  --danger:            #FF8074;

  --shadow-2:  0 1px 2px rgba(0, 0, 0, .40), 0 2px 8px rgba(0, 0, 0, .28);
  --shadow-4:  0 2px 4px rgba(0, 0, 0, .40), 0 8px 20px rgba(0, 0, 0, .34);
  --shadow-8:  0 4px 8px rgba(0, 0, 0, .44), 0 18px 40px rgba(0, 0, 0, .40);
  --shadow-accent: 0 8px 28px rgba(76, 194, 255, .20);

  color-scheme: dark;
}

/* ------------------------------------------------------------------ Reset */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}

body {
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  transition: background-color .35s var(--ease-standard), color .35s var(--ease-standard);
}

/* Mica 底：极淡的蓝色渐层 + 网格 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(900px 520px at 12% -8%, var(--accent-soft) 0%, transparent 62%),
    radial-gradient(760px 460px at 92% 4%, rgba(0, 103, 192, .07) 0%, transparent 58%),
    radial-gradient(900px 700px at 50% 108%, rgba(0, 103, 192, .05) 0%, transparent 60%),
    var(--bg);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .5;
  background-image:
    linear-gradient(to right, var(--stroke) 1px, transparent 1px),
    linear-gradient(to bottom, var(--stroke) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 0%, transparent 78%);
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; }

::selection { background: var(--accent); color: #fff; }

:focus-visible {
  outline: 2px solid var(--text-1);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

/* 滚动条（WinUI 细滚动条） */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--text-4);
  border-radius: var(--r-pill);
  border: 3px solid transparent;
  background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--text-3); background-clip: content-box; }

/* ------------------------------------------------------------- Typography */
h1, h2, h3, h4, h5 {
  font-weight: 600;
  line-height: 1.22;
  color: var(--text-1);
  letter-spacing: -.012em;
}

.display {
  font-size: clamp(2.35rem, 4.7vw, 4.4rem);
  font-weight: 650;
  line-height: 1.1;
  letter-spacing: -.03em;
}

.h2 {
  font-size: clamp(1.9rem, 3.4vw, 2.85rem);
  font-weight: 640;
  letter-spacing: -.022em;
  line-height: 1.2;
}

.h3 {
  font-size: clamp(1.3rem, 2vw, 1.55rem);
  font-weight: 600;
  line-height: 1.35;
}

.lead {
  font-size: clamp(1rem, 1.35vw, 1.125rem);
  line-height: 1.85;
  color: var(--text-2);
}

.muted { color: var(--text-3); }
.small { font-size: .875rem; line-height: 1.7; }

.tnum { font-variant-numeric: tabular-nums; }
.mono-num { font-family: var(--font-num); font-variant-numeric: tabular-nums; }

/* 章节小标签（01 — 诊断） */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent-text);
  font-family: var(--font-num);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  opacity: .55;
}
.eyebrow--center::before { display: none; }

/* ---------------------------------------------------------------- Layout */
.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container-wide { max-width: 1360px; }

.section { padding-block: var(--section-y); position: relative; }
.section--tight { padding-block: clamp(48px, 6vw, 84px); }
.section--alt {
  background: linear-gradient(180deg, transparent, var(--layer-2) 12%, var(--layer-2) 88%, transparent);
}

.section-head { max-width: 720px; }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head .eyebrow { margin-bottom: 18px; }
.section-head .lead { margin-top: 18px; }

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.split--top { align-items: start; }

.stack-sm > * + * { margin-top: 12px; }
.stack > * + * { margin-top: 20px; }
.stack-lg > * + * { margin-top: 32px; }

.grid { display: grid; gap: clamp(16px, 2vw, 24px); }
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------------------------------------------------------------- Buttons */
.btn {
  --btn-bg: var(--layer-1);
  --btn-fg: var(--text-1);
  --btn-bd: var(--stroke-strong);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 42px;
  padding: 0 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--btn-bd);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: .9375rem;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color .18s var(--ease-standard),
              border-color .18s var(--ease-standard),
              box-shadow .22s var(--ease-standard),
              transform .18s var(--ease-spring);
  box-shadow: var(--shadow-2);
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-4); }
.btn:active { transform: translateY(0) scale(.985); box-shadow: var(--shadow-2); }

/* WinUI 强调按钮：顶部 1px 高光 + 底部暗边 */
.btn--primary {
  --btn-bg: var(--accent);
  --btn-fg: #FFFFFF;
  --btn-bd: transparent;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .22),
              inset 0 -1px 0 rgba(0, 0, 0, .12),
              var(--shadow-4);
}
.btn--primary:hover {
  --btn-bg: var(--accent-hover);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .22),
              var(--shadow-accent);
}
.btn--primary:active { --btn-bg: var(--accent-pressed); }

:root[data-theme="dark"] .btn--primary { --btn-fg: #04222E; }

.btn--ghost {
  --btn-bg: transparent;
  --btn-bd: transparent;
  box-shadow: none;
  color: var(--text-2);
}
.btn--ghost:hover {
  --btn-bg: var(--layer-3);
  --btn-bd: transparent;
  box-shadow: none;
  color: var(--text-1);
}

.btn--lg { height: 50px; padding: 0 26px; font-size: 1rem; border-radius: var(--r-lg); }
.btn--block { width: 100%; }

.btn .arrow { transition: transform .3s var(--ease-decel); }
.btn:hover .arrow { transform: translateX(4px); }

/* 文本链 */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--accent-text);
  font-size: .9375rem;
}
.link-arrow svg { transition: transform .3s var(--ease-decel); }
.link-arrow:hover svg { transform: translateX(4px); }

/* ------------------------------------------------------------------ Chips */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 26px;
  padding: 0 11px;
  border-radius: var(--r-pill);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  color: var(--text-3);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .02em;
  box-shadow: var(--shadow-2);
}
.chip--accent {
  background: var(--accent-soft);
  border-color: transparent;
  color: var(--accent-text);
  box-shadow: none;
}
.chip__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 3px var(--accent-ring);
}

/* -------------------------------------------------------------------- Nav */
.nav {
  position: fixed;
  inset: 12px 0 auto;
  z-index: 100;
  pointer-events: none;
}
.nav__inner {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 16px;
  height: 60px;
  padding: 0 10px 0 16px;
  border-radius: var(--r-xl);
  border: 1px solid transparent;
  transition: background-color .3s var(--ease-standard),
              border-color .3s var(--ease-standard),
              box-shadow .3s var(--ease-standard),
              backdrop-filter .3s linear;
}
.nav.is-stuck .nav__inner {
  background: rgba(255, 255, 255, .76);
  background: color-mix(in srgb, var(--layer-1) 72%, transparent);
  -webkit-backdrop-filter: blur(22px) saturate(1.7);
  backdrop-filter: blur(22px) saturate(1.7);
  border-color: var(--stroke);
  box-shadow: var(--shadow-4);
}

.brand { display: flex; align-items: center; gap: 10px; margin-right: auto; }
.brand__mark {
  width: 34px; height: 34px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: linear-gradient(160deg, var(--accent) 0%, #0A80DA 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .28), 0 4px 12px var(--accent-ring);
  flex: none;
}
.brand__mark svg { width: 18px; height: 18px; }
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__name { font-weight: 680; font-size: .975rem; color: var(--text-1); letter-spacing: .01em; }
.brand__sub {
  font-size: .625rem;
  letter-spacing: .18em;
  color: var(--text-4);
  font-family: var(--font-num);
  text-transform: uppercase;
}

.nav__links { display: flex; align-items: center; gap: 2px; }
.nav__link {
  position: relative;
  padding: 8px 14px;
  border-radius: var(--r-md);
  font-size: .9375rem;
  font-weight: 550;
  color: var(--text-2);
  transition: color .18s var(--ease-standard), background-color .18s var(--ease-standard);
}
.nav__link:hover { color: var(--text-1); background: var(--layer-3); }
.nav__link.is-active { color: var(--accent-text); }
.nav__link.is-active::after {
  content: "";
  position: absolute;
  left: 50%; bottom: -1px;
  width: 14px; height: 2px;
  border-radius: 2px;
  background: currentColor;
  transform: translateX(-50%);
}

.nav__actions { display: flex; align-items: center; gap: 8px; }

/* 主题切换（WinUI ToggleButton 风格） */
.icon-btn {
  width: 38px; height: 38px;
  display: grid;
  place-items: center;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  color: var(--text-2);
  box-shadow: var(--shadow-2);
  transition: color .18s var(--ease-standard), background-color .18s var(--ease-standard),
              border-color .18s var(--ease-standard), transform .18s var(--ease-spring);
}
.icon-btn:hover { color: var(--text-1); border-color: var(--stroke-strong); transform: translateY(-1px); }
.icon-btn svg { width: 17px; height: 17px; }
.icon-btn .icon-moon { display: none; }
:root[data-theme="dark"] .icon-btn .icon-moon { display: block; }
:root[data-theme="dark"] .icon-btn .icon-sun { display: none; }

.nav__burger {
  display: none;
  width: 38px; height: 38px;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  place-items: center;
  color: var(--text-1);
  box-shadow: var(--shadow-2);
}
.nav__burger svg { width: 18px; height: 18px; }

/* 移动端抽屉 */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 99;
  display: none;
  padding: 88px var(--gutter) var(--gutter);
  background: rgba(243, 245, 249, .9);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}
.drawer.is-open { display: block; animation: fadeIn .22s var(--ease-standard); }
.drawer__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-radius: var(--r-lg);
  background: var(--layer-1);
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow-2);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-1);
}
.drawer__link + .drawer__link { margin-top: 10px; }

/* ------------------------------------------------------------------- Hero */
.hero {
  position: relative;
  padding-top: clamp(132px, 15vw, 188px);
  padding-bottom: clamp(56px, 7vw, 96px);
  overflow: hidden;
}
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
  gap: clamp(36px, 5vw, 64px);
  align-items: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 32px;
  padding: 0 6px 0 12px;
  margin-bottom: 26px;
  border-radius: var(--r-pill);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  font-size: .8125rem;
  font-weight: 550;
  color: var(--text-2);
}
.hero__badge b {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 9px;
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  color: var(--accent-text);
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .06em;
}

.hero h1 { margin-bottom: 22px; }
.hero h1 .grad {
  background: linear-gradient(100deg, var(--accent) 0%, #1E9BFF 52%, #56C8F5 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__lead { max-width: 30em; font-size: clamp(1rem, 1.2vw, 1.0625rem); color: var(--text-2); }

.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 26px;
  margin-top: 34px;
  padding-top: 26px;
  border-top: 1px solid var(--divider);
  font-size: .8125rem;
  color: var(--text-3);
}
.hero__meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero__meta svg { width: 15px; height: 15px; color: var(--accent); }

/* Hero 右侧：WinUI 风格监视器窗口 */
.device {
  position: relative;
}
.device__float {
  position: relative;
  border-radius: var(--r-2xl);
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, .86);
  background: color-mix(in srgb, var(--layer-1) 86%, transparent);
  -webkit-backdrop-filter: blur(28px) saturate(1.6);
  backdrop-filter: blur(28px) saturate(1.6);
  box-shadow: var(--shadow-8);
  overflow: hidden;
}

.device__bar {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 44px;
  padding: 0 14px;
  border-bottom: 1px solid var(--divider);
  background: color-mix(in srgb, var(--layer-2) 70%, transparent);
}
.device__dots { display: flex; gap: 6px; }
.device__dots i {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--divider);
}
.device__dots i:first-child { background: #FF5F57; opacity: .85; }
.device__dots i:nth-child(2) { background: #FEBC2E; opacity: .85; }
.device__dots i:nth-child(3) { background: #28C840; opacity: .85; }
.device__title {
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-3);
  letter-spacing: .04em;
  margin-inline: auto;
}
.device__body { padding: 22px 22px 36px; }

.meter__top {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 6px;
}
.meter__label { font-size: .75rem; font-weight: 600; color: var(--text-3); letter-spacing: .1em; text-transform: uppercase; }
.meter__value {
  font-family: var(--font-num);
  font-size: 2.9rem;
  font-weight: 650;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}
.meter__value small { font-size: .875rem; font-weight: 600; color: var(--text-3); margin-left: 6px; letter-spacing: 0; }
.meter__delta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  height: 24px;
  padding: 0 9px;
  border-radius: var(--r-pill);
  background: rgba(15, 123, 79, .1);
  color: var(--ok);
  font-size: .75rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
:root[data-theme="dark"] .meter__delta { background: rgba(84, 208, 138, .14); }

.bars {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 96px;
  margin: 18px 0 4px;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--divider);
}
.bars i {
  flex: 1;
  border-radius: 3px 3px 0 0;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-soft-2) 100%);
  height: var(--h, 40%);
  opacity: .9;
}
.bars i:nth-child(even) { background: linear-gradient(180deg, color-mix(in srgb, var(--accent) 55%, #8FD4FF) 0%, var(--accent-soft-2) 100%); }

.device__rows { margin-top: 16px; display: grid; gap: 10px; }
.device__row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: .8125rem;
}
.device__row span:first-child { color: var(--text-3); min-width: 76px; }
.device__row b {
  margin-left: auto;
  font-family: var(--font-num);
  font-weight: 650;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}
.device__track {
  flex: 1;
  height: 5px;
  border-radius: 3px;
  background: var(--layer-3);
  overflow: hidden;
}
.device__track i {
  display: block;
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), #6FCBFF);
  width: var(--w, 50%);
  transform-origin: left center;
  animation: growScale 1.1s var(--ease-decel) both;
  animation-delay: .5s;
}

/* 浮动小卡 */
.float-card {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, .9);
  background: color-mix(in srgb, var(--layer-1) 90%, transparent);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-4);
  font-size: .8125rem;
  font-weight: 600;
  color: var(--text-1);
  white-space: nowrap;
}
.float-card small { display: block; font-size: .6875rem; font-weight: 500; color: var(--text-3); }
.float-card__icon {
  width: 30px; height: 30px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent-text);
  flex: none;
}
.float-card__icon svg { width: 15px; height: 15px; }
.float-card--a { left: 26px; bottom: -34px; }
.float-card--b { right: -22px; top: -28px; }

/* ---------------------------------------------------------------- Marquee */
.marquee {
  position: relative;
  padding: 18px 0;
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
  background: color-mix(in srgb, var(--layer-1) 55%, transparent);
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.marquee__track {
  display: flex;
  width: max-content;
  animation: marquee 38s linear infinite;
}

.marquee__group { display: flex; align-items: center; gap: 0; }
.marquee__item {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 0 22px;
  font-size: .9375rem;
  font-weight: 550;
  color: var(--text-2);
  white-space: nowrap;
}
.marquee__item::after {
  content: "◆";
  font-size: .5rem;
  color: var(--accent);
  opacity: .6;
}

/* ------------------------------------------------------------------ Cards */
.card {
  position: relative;
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  transition: transform .3s var(--ease-decel),
              box-shadow .3s var(--ease-standard),
              border-color .3s var(--ease-standard);
}
.card--hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-8);
  border-color: var(--accent-ring);
}
.card--pad { padding: clamp(22px, 2.4vw, 32px); }
.card--soft { background: color-mix(in srgb, var(--layer-1) 70%, var(--layer-2)); }

.card__num {
  font-family: var(--font-num);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--accent-text);
}

/* 指标卡（痛点区） */
.metric {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  transition: border-color .3s var(--ease-standard), box-shadow .3s var(--ease-standard);
}
.metric:hover { border-color: var(--accent-ring); box-shadow: var(--shadow-4); }
.metric__val {
  font-family: var(--font-num);
  font-size: 2.125rem;
  font-weight: 650;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}
.metric__val em { font-style: normal; font-size: 1rem; color: var(--text-3); margin-left: 4px; }
.metric__key { font-size: .8125rem; font-weight: 600; color: var(--text-2); }
.metric__desc { font-size: .8125rem; color: var(--text-3); line-height: 1.65; }

/* 方案价格卡 */
.plan {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: clamp(22px, 2.4vw, 30px);
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  transition: transform .3s var(--ease-decel), box-shadow .3s var(--ease-standard),
              border-color .3s var(--ease-standard);
}
.plan:hover { transform: translateY(-5px); box-shadow: var(--shadow-8); }
.plan--feature {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow-8);
  background:
    linear-gradient(180deg, var(--accent-soft) 0%, transparent 34%),
    var(--layer-1);
}
.plan__flag {
  position: absolute;
  top: -12px; right: 18px;
  height: 24px;
  padding: 0 10px;
  display: inline-flex;
  align-items: center;
  border-radius: var(--r-pill);
  background: var(--accent);
  color: #fff;
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .06em;
  box-shadow: var(--shadow-accent);
}
:root[data-theme="dark"] .plan__flag { color: #04222E; }
.plan__head { padding-bottom: 20px; border-bottom: 1px dashed var(--divider); }
.plan__kind {
  font-family: var(--font-num);
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--accent-text);
  text-transform: uppercase;
}
.plan__name { margin-top: 8px; font-size: 1.1875rem; font-weight: 650; color: var(--text-1); }
.plan__price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-top: 14px;
  font-family: var(--font-num);
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}
.plan__price i { font-style: normal; font-size: 1rem; font-weight: 600; color: var(--text-3); }
.plan__price b { font-size: 2.25rem; font-weight: 680; letter-spacing: -.03em; line-height: 1; }
.plan__price span { font-size: .8125rem; color: var(--text-3); font-weight: 500; margin-left: 2px; }
.plan__time { margin-top: 8px; font-size: .75rem; color: var(--text-3); }

.plan__list { display: grid; gap: 12px; padding: 20px 0; }
.plan__list li {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px;
  font-size: .875rem;
  line-height: 1.6;
  color: var(--text-2);
}
.plan__list li b { color: var(--text-1); font-weight: 600; }
.plan__list svg { width: 16px; height: 16px; margin-top: 3px; color: var(--accent); flex: none; }
.plan__list .is-off { color: var(--text-3); }
.plan__list .is-off svg { color: var(--text-4); }

.plan__foot { margin-top: auto; padding-top: 18px; border-top: 1px dashed var(--divider); }
.plan__note {
  margin-top: 14px;
  font-size: .75rem;
  line-height: 1.7;
  color: var(--text-3);
}

.plan-group + .plan-group { margin-top: clamp(40px, 5vw, 64px); }
.plan-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding-bottom: 18px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--divider);
}
.plan-group__head h3 { font-size: 1.0625rem; font-weight: 650; }
.plan-group__head p { font-size: .8125rem; color: var(--text-3); max-width: 62ch; }

/* ------------------------------------------------------------- Statement */
.statement {
  position: relative;
  overflow: hidden;
  padding-block: clamp(64px, 8vw, 112px);
  border-block: 1px solid var(--divider);
  background:
    radial-gradient(700px 320px at 50% 0%, var(--accent-soft), transparent 70%),
    var(--layer-2);
  text-align: center;
}
.statement__mark {
  display: flex;
  justify-content: center;
  margin-bottom: 26px;
  color: var(--accent);
  opacity: .26;
}
.statement__mark svg { width: clamp(40px, 5vw, 56px); height: auto; }
.statement blockquote {
  max-width: 22em;
  margin-inline: auto;
  font-size: clamp(1.5rem, 3vw, 2.35rem);
  font-weight: 620;
  line-height: 1.45;
  letter-spacing: -.02em;
  color: var(--text-1);
}
.statement blockquote em {
  font-style: normal;
  color: var(--accent-text);
}
.statement__by {
  margin-top: 22px;
  font-size: .8125rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text-3);
  font-family: var(--font-num);
}

/* --------------------------------------------------------- Tabs / 技术区 */
.tabs { display: grid; grid-template-columns: 300px minmax(0, 1fr); gap: clamp(20px, 3vw, 40px); align-items: start; }
.tabs__nav { display: grid; gap: 8px; }
.tab-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 16px 18px;
  border-radius: var(--r-lg);
  border: 1px solid transparent;
  background: transparent;
  text-align: left;
  transition: background-color .2s var(--ease-standard),
              border-color .2s var(--ease-standard),
              box-shadow .2s var(--ease-standard);
}
.tab-btn__no {
  font-family: var(--font-num);
  font-size: .75rem;
  font-weight: 700;
  color: var(--text-4);
  letter-spacing: .1em;
  transition: color .2s var(--ease-standard);
}
.tab-btn__txt { display: flex; flex-direction: column; gap: 2px; }
.tab-btn__txt b { font-size: .9375rem; font-weight: 600; color: var(--text-2); transition: color .2s var(--ease-standard); }
.tab-btn__txt small { font-size: .75rem; color: var(--text-4); line-height: 1.5; }
.tab-btn:hover { background: var(--layer-1); border-color: var(--stroke); }
.tab-btn.is-active {
  background: var(--layer-1);
  border-color: var(--stroke);
  box-shadow: var(--shadow-4);
}
.tab-btn.is-active .tab-btn__no { color: var(--accent-text); }
.tab-btn.is-active .tab-btn__txt b { color: var(--text-1); }
.tab-btn.is-active::before {
  content: "";
  position: absolute;
  left: 0; top: 14px; bottom: 14px;
  width: 3px;
  border-radius: 3px;
  background: var(--accent);
}
.tab-btn { position: relative; }

.tabs__panel { min-height: 340px; }
.tab-panel { display: none; }
.tab-panel.is-active { display: block; animation: panelIn .42s var(--ease-decel) both; }
.tab-panel__visual {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 372px;
  padding: 30px;
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background:
    linear-gradient(160deg, var(--accent-soft) 0%, transparent 46%),
    var(--layer-1);
  box-shadow: var(--shadow-4);
  overflow: hidden;
}
.tab-panel__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(var(--stroke-strong) 1px, transparent 1px);
  background-size: 16px 16px;
  opacity: .5;
  mask-image: radial-gradient(circle at 80% 20%, #000, transparent 62%);
  -webkit-mask-image: radial-gradient(circle at 80% 20%, #000, transparent 62%);
}
.tab-panel h4 { font-size: 1.375rem; margin-bottom: 10px; }
.tab-panel p { font-size: .9375rem; color: var(--text-2); }
.tab-panel__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 20px;
}
.tab-panel__list li {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 14px;
  border-radius: var(--r-md);
  background: color-mix(in srgb, var(--layer-1) 72%, transparent);
  border: 1px solid var(--stroke);
  font-size: .8125rem;
  color: var(--text-2);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.tab-panel__list li::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
  box-shadow: 0 0 0 3px var(--accent-ring);
}

/* --------------------------------------------------------------- Process */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.step {
  position: relative;
  padding: 26px 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
}

.step h4 { margin: 10px 0 8px; font-size: 1rem; }
.step p { font-size: .8125rem; color: var(--text-3); line-height: 1.7; }
.step::after {
  content: "";
  position: absolute;
  top: 38px; right: -16px;
  width: 16px; height: 1px;
  background: var(--stroke-strong);
}
.step:last-child::after { display: none; }

/* -------------------------------------------------------------- Warranty */
.warranty { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: clamp(16px, 2vw, 24px); }
.warranty__card {
  position: relative;
  padding: clamp(26px, 3vw, 38px);
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-4);
  overflow: hidden;
}
.warranty__card::before {
  content: "";
  position: absolute;
  inset: auto -60px -80px auto;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-soft) 0%, transparent 68%);
  pointer-events: none;
}
.warranty__big {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: var(--font-num);
  font-size: clamp(3rem, 6vw, 4.25rem);
  font-weight: 680;
  line-height: 1;
  letter-spacing: -.04em;
  color: var(--text-1);
  font-variant-numeric: tabular-nums;
}
.warranty__big small { font-size: 1rem; font-weight: 600; color: var(--text-3); letter-spacing: 0; }
.warranty__card h4 { position: relative; margin-top: 16px; font-size: 1.125rem; }
.warranty__card p { position: relative; margin-top: 10px; font-size: .875rem; color: var(--text-3); }
.warranty__tags { position: relative; display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }

/* -------------------------------------------------------------- Feedback */
.quote {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: clamp(22px, 2.6vw, 30px);
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  transition: transform .3s var(--ease-decel), box-shadow .3s var(--ease-standard);
}
.quote:hover { transform: translateY(-3px); box-shadow: var(--shadow-4); }
.quote__stars { display: flex; gap: 3px; color: #F2B01E; }
.quote__stars svg { width: 14px; height: 14px; }
.quote p { font-size: .9375rem; line-height: 1.8; color: var(--text-2); }
.quote__who { display: flex; align-items: center; gap: 10px; margin-top: auto; padding-top: 4px; }
.quote__avatar {
  width: 34px; height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent-text);
  font-size: .8125rem;
  font-weight: 700;
  flex: none;
}
.quote__who b { display: block; font-size: .8125rem; color: var(--text-1); }
.quote__who small { font-size: .75rem; color: var(--text-3); }

/* ------------------------------------------------------------ Team cards */
.member {
  padding: 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  transition: transform .3s var(--ease-decel), border-color .3s var(--ease-standard);
}
.member:hover { transform: translateY(-3px); border-color: var(--accent-ring); }
.member__top { display: flex; align-items: center; gap: 12px; }
.member__avatar {
  width: 42px; height: 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: .9375rem;
  color: var(--accent-text);
  background: var(--accent-soft);
  border: 1px solid var(--accent-ring);
  flex: none;
}
.member h4 { font-size: 1rem; }
.member__role { font-size: .75rem; color: var(--accent-text); font-weight: 600; letter-spacing: .04em; }
.member p { margin-top: 14px; font-size: .8125rem; color: var(--text-3); line-height: 1.7; }

/* ------------------------------------------------------------------- FAQ */
.faq { display: grid; gap: 10px; max-width: 880px; margin-inline: auto; }
.faq__item {
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  transition: border-color .25s var(--ease-standard), box-shadow .25s var(--ease-standard);
}
.faq__item:hover { border-color: var(--stroke-strong); }
.faq__item.is-open { border-color: var(--accent-ring); box-shadow: var(--shadow-4); }
.faq__q {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 20px 22px;
  text-align: left;
  font-size: .9375rem;
  font-weight: 600;
  color: var(--text-1);
}
.faq__q span:first-child {
  font-family: var(--font-num);
  font-size: .75rem;
  font-weight: 700;
  color: var(--accent-text);
  letter-spacing: .08em;
  flex: none;
}
.faq__sign {
  margin-left: auto;
  width: 24px; height: 24px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--stroke);
  color: var(--text-3);
  flex: none;
  transition: transform .3s var(--ease-decel), background-color .25s, color .25s, border-color .25s;
}
.faq__sign svg { width: 12px; height: 12px; }
.faq__item.is-open .faq__sign {
  transform: rotate(45deg);
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.faq__a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .34s var(--ease-decel);
}
.faq__item.is-open .faq__a { grid-template-rows: 1fr; }
.faq__a > div { overflow: hidden; }
.faq__a p {
  padding: 0 22px 22px;
  font-size: .875rem;
  line-height: 1.85;
  color: var(--text-3);
}
.faq__a p + p { padding-top: 0; }

/* --------------------------------------------------------------- Contact */
.contact {
  position: relative;
  overflow: hidden;
  padding-block: clamp(72px, 9vw, 120px);
  background:
    radial-gradient(900px 420px at 50% -10%, var(--accent-soft), transparent 66%),
    var(--layer-2);
  border-top: 1px solid var(--divider);
}
.contact__grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 40px; }
.contact__card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  transition: transform .25s var(--ease-decel), box-shadow .25s var(--ease-standard),
              border-color .25s var(--ease-standard);
}
.contact__card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-ring);
  box-shadow: var(--shadow-4);
}
/* 右侧箭头（WinUI 的 Chevron） */
.contact__card::after {
  content: "";
  width: 7px;
  height: 7px;
  margin-left: auto;
  border-right: 2px solid var(--text-4);
  border-top: 2px solid var(--text-4);
  transform: rotate(45deg);
  transition: border-color .2s var(--ease-standard), transform .25s var(--ease-decel);
}
.contact__card:hover::after {
  border-color: var(--accent-text);
  transform: rotate(45deg) translate(2px, -2px);
}
.contact__icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent-text);
  flex: none;
}
.contact__icon svg { width: 18px; height: 18px; }
.contact__card b { display: block; font-size: .9375rem; color: var(--text-1); }
.contact__card small { font-size: .75rem; color: var(--text-3); font-family: var(--font-num); letter-spacing: .02em; }

.cta-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-top: 28px;
  padding: clamp(22px, 3vw, 30px);
  border-radius: var(--r-xl);
  border: 1px solid var(--accent-ring);
  background:
    linear-gradient(120deg, var(--accent-soft) 0%, transparent 70%),
    var(--layer-1);
  box-shadow: var(--shadow-4);
}
.cta-bar h3 { font-size: 1.125rem; }
.cta-bar p { margin-top: 6px; font-size: .875rem; color: var(--text-3); }

/* ---------------------------------------------------------------- Footer */
.footer {
  padding-block: 52px 34px;
  border-top: 1px solid var(--divider);
  background: var(--layer-2);
}
.footer__top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 32px;
  padding-bottom: 34px;
  border-bottom: 1px solid var(--divider);
}
.footer__brand { max-width: 320px; }
.footer__brand p { margin-top: 14px; font-size: .8125rem; color: var(--text-3); line-height: 1.75; }
.footer__cols { display: flex; gap: clamp(28px, 5vw, 72px); }
.footer__col h5 {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 14px;
}
.footer__col li + li { margin-top: 9px; }
.footer__col a { font-size: .875rem; color: var(--text-2); transition: color .18s; }
.footer__col a:hover { color: var(--accent-text); }
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 26px;
  font-size: .75rem;
  color: var(--text-4);
}
.footer__bottom a:hover { color: var(--text-2); }


/* =========================================================================
   MOTION SYSTEM
   -------------------------------------------------------------------------
   三条铁律：
   1) 只动 transform / opacity —— 交给 GPU 合成，滚动不掉帧
   2) 系统设置不静音整站，只降级为"仅透明度"
   3) 单条时长 ≤ 1s，首屏主体 1.2s 内完成
   ========================================================================= */

:root {
  --d-1: .18s;
  --d-2: .32s;
  --d-3: .6s;
}

/* ------------------------------------------------------ 首屏载入编排 */
.hero-in {
  opacity: 0;
  transform: translateY(18px);
}
body.is-loaded .hero-in {
  animation: riseIn .85s var(--ease-decel) both;
  animation-delay: var(--d, .3s);
}

/* 标题逐行遮罩上浮 */
.hero__title .line {
  display: block;
  overflow: hidden;
  padding-bottom: .05em;
  margin-bottom: -.05em;
}
.hero__title .line__i {
  display: block;
  transform: translateY(112%);
}
body.is-loaded .hero__title .line__i {
  animation: lineUp .9s var(--ease-decel) both;
  animation-delay: var(--d, .18s);
}

/* 右侧监视器：视差容器 + 入场上浮 + 长驻微浮 */
.hero__visual { perspective: 1600px; }
.device {
  transform:
    translate3d(var(--px, 0px), var(--py, 0px), 0)
    rotateX(var(--rx, 0deg))
    rotateY(var(--ry, 0deg));
  transform-style: preserve-3d;
}
.device__float { opacity: 0; }
body.is-loaded .device__float {
  animation:
    cardIn .95s var(--ease-decel) .34s both,
    floatY 11s ease-in-out 1.4s infinite;
}

/* 柱状图逐根生长 */
.bars i {
  transform: scaleY(0);
  transform-origin: bottom center;
}
body.is-loaded .bars i {
  animation: barIn .62s var(--ease-decel) both;
  animation-delay: calc(.46s + var(--i, 0) * 26ms);
}

/* 两张浮动小卡：等监视器卡片到位后再落下来，避免"悬空出现" */
.float-card { opacity: 0; }
body.is-loaded .float-card--b {
  animation: riseIn .55s var(--ease-decel) .95s both, floatY 8s ease-in-out 1.7s infinite;
}
body.is-loaded .float-card--a {
  animation: riseIn .55s var(--ease-decel) 1.05s both, floatY 7s ease-in-out 1.8s infinite;
}

/* ---------------------------------------------------------- 滚动揭示 */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity .68s var(--ease-decel),
    transform .68s var(--ease-decel);
  transition-delay: calc(var(--i, 0) * 85ms);
  will-change: opacity, transform;
}
.reveal.is-in {
  opacity: 1;
  transform: none;
  will-change: auto;
}
.reveal[data-delay="1"] { --i: 1; }
.reveal[data-delay="2"] { --i: 2; }
.reveal[data-delay="3"] { --i: 3; }
.reveal[data-delay="4"] { --i: 4; }

/* 宣言：遮罩逐行擦出 */
.mask .line { display: block; overflow: hidden; }
.mask .line__i {
  display: block;
  transform: translateY(106%);
  opacity: 0;
  transition:
    transform 1s var(--ease-decel),
    opacity .7s linear;
  transition-delay: calc(var(--i, 0) * 130ms);
}
.mask.is-in .line__i { transform: none; opacity: 1; }

/* ------------------------------------------- 卡片高光（WinUI Reveal） */
[data-spotlight] { position: relative; }
[data-spotlight]::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--d-2) var(--ease-standard);
  background: radial-gradient(
    260px circle at var(--mx, 50%) var(--my, 0%),
    rgba(0, 103, 192, .10),
    transparent 62%
  );
}
[data-spotlight]:hover::after { opacity: 1; }
:root[data-theme="dark"] [data-spotlight]::after {
  background: radial-gradient(
    260px circle at var(--mx, 50%) var(--my, 0%),
    rgba(76, 194, 255, .13),
    transparent 62%
  );
}
@media (hover: none) {
  [data-spotlight]::after { display: none; }
}

/* -------------------------------------------------------- 动效开关 */
:root[data-motion="reduced"] .icon-motion-on { display: none; }
.icon-motion-off { display: none; }
:root[data-motion="reduced"] .icon-motion-off { display: block; }

/* ---------------------- 降级模式：只留透明度，不留位移、循环、视差 */
:root[data-motion="reduced"] .reveal {
  transform: none !important;
  transition: opacity .3s linear;
  transition-delay: 0s;
}
:root[data-motion="reduced"] .hero-in {
  animation: none;
  opacity: 1;
  transform: none;
}
:root[data-motion="reduced"] .hero__title .line__i {
  animation: none;
  transform: none;
}
:root[data-motion="reduced"] .device__float {
  animation: none;
  opacity: 1;
}
:root[data-motion="reduced"] .bars i {
  animation: none;
  transform: scaleY(1);
}
:root[data-motion="reduced"] .device__track i { animation: none; }
:root[data-motion="reduced"] .marquee__track,
:root[data-motion="reduced"] .float-card { animation: none; }
:root[data-motion="reduced"] .float-card { opacity: 1; }
:root[data-motion="reduced"] .device { transform: none !important; }
:root[data-motion="reduced"] [data-spotlight]::after { display: none; }
:root[data-motion="reduced"] .mask .line__i { transform: none; opacity: 1; }
:root[data-motion="reduced"] .tab-panel.is-active { animation: none; }

/* ------------------------------------------------------ 动效提示条 */
.motion-hint {
  position: fixed;
  left: 20px;
  bottom: 20px;
  z-index: 120;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: min(430px, calc(100vw - 40px));
  padding: 11px 12px 11px 16px;
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke-strong);
  background: var(--layer-1);
  box-shadow: var(--shadow-8);
  font-size: .8125rem;
  line-height: 1.6;
  color: var(--text-2);
  animation: riseIn .5s var(--ease-decel) .9s both;
}
.motion-hint b { color: var(--text-1); font-weight: 650; }
.motion-hint__go {
  flex: none;
  height: 30px;
  padding: 0 12px;
  border-radius: var(--r-sm);
  background: var(--accent);
  color: #fff;
  font-size: .75rem;
  font-weight: 650;
  transition: background-color var(--d-1) var(--ease-standard);
}
:root[data-theme="dark"] .motion-hint__go { color: #04222E; }
.motion-hint__go:hover { background: var(--accent-hover); }
.motion-hint__close {
  flex: none;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--text-3);
  transition: background-color var(--d-1) var(--ease-standard), color var(--d-1) var(--ease-standard);
}
.motion-hint__close:hover { background: var(--layer-3); color: var(--text-1); }

/* ----------------------------------------------- 预览模式 / 无 JS 兜底 */
.no-reveal .reveal,
.no-reveal .hero-in {
  opacity: 1 !important;
  transform: none !important;
}
.no-reveal .hero__title .line__i,
.no-reveal .mask .line__i {
  transform: none !important;
  opacity: 1 !important;
}
.no-reveal .device__float {
  animation: none !important;
  opacity: 1 !important;
  transform: none !important;
}
.no-reveal .device { transform: none !important; }
.no-reveal .float-card,
.no-reveal .bars i,
.no-reveal .device__track i { animation: none !important; }
.no-reveal .float-card { opacity: 1 !important; transform: none !important; }
.no-reveal .bars i { transform: scaleY(1) !important; }

/* ------------------------------------------------------------- Keyframes */
@keyframes riseIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: none; }
}
@keyframes lineUp {
  from { transform: translateY(112%); }
  to { transform: translateY(0); }
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(26px) scale(.97); }
  to { opacity: 1; transform: none; }
}
@keyframes barIn {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}
@keyframes growScale {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}
@keyframes growX { from { width: 0; } }
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes panelIn {
  from { opacity: 0; transform: translateX(22px); }
  to { opacity: 1; transform: none; }
}

/* ---------------------------------------------------------------- Responsive */
@media (max-width: 1080px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { order: 2; max-width: 560px; perspective: none; }
  .device { transform: none !important; }
  .float-card--a { left: 8px; bottom: -16px; }
  .float-card--b { right: 8px; top: -16px; }
  .tabs { grid-template-columns: 1fr; }
  .tabs__nav { grid-auto-flow: column; grid-auto-columns: max-content; overflow-x: auto; padding-bottom: 6px; scrollbar-width: none; }
  .tabs__nav::-webkit-scrollbar { display: none; }
  .tab-btn { white-space: nowrap; }
  .tab-btn.is-active::before { display: none; }
  .tab-btn__txt small { display: none; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step::after { display: none; }
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__burger { display: grid; }
  .nav__actions .btn--primary { display: none; }
  .split { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .warranty { grid-template-columns: 1fr; }
  .contact__grid { grid-template-columns: 1fr; }
  .hero__meta { gap: 10px 20px; }
}

@media (max-width: 640px) {
  :root { --r-xl: 14px; --r-2xl: 18px; }
  body { font-size: 15px; }
  .section { padding-block: clamp(56px, 12vw, 80px); }
  .hero { padding-top: 118px; }
  .hero__cta .btn { flex: 1; }
  .steps { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
  .tab-panel__list { grid-template-columns: 1fr; }
  .bars { height: 72px; }
  .device__body { padding: 16px; }
  .meter__value { font-size: 2.3rem; }
  .float-card { display: none; }
  .plan__price b { font-size: 1.9rem; }
  .cta-bar { flex-direction: column; align-items: flex-start; }
  .cta-bar .btn { width: 100%; }
  .motion-hint { left: 12px; right: 12px; bottom: 12px; max-width: none; }
}

/* 系统级"减少动效"只作为兜底：JS 正常时会用 data-motion 精确控制 */
@media (prefers-reduced-motion: reduce) {
  html:not([data-motion]) .reveal,
  html:not([data-motion]) .hero-in {
    opacity: 1;
    transform: none;
  }
}

/* 无 JS 时全部内容保持可见 */
html.no-js .reveal,
html.no-js .hero-in { opacity: 1; transform: none; }
html.no-js .hero__title .line__i,
html.no-js .mask .line__i { transform: none; opacity: 1; }
html.no-js .device__float,
html.no-js .float-card { opacity: 1; }
html.no-js .bars i { transform: scaleY(1); }


/* =========================================================================
   扩展组件 · 业务页（系统专区 / 软件专区 / 首页新内容块）
   ========================================================================= */

/* ---------------------------------------------------------- 子页 Hero */
.page-hero {
  position: relative;
  padding-top: clamp(120px, 13vw, 168px);
  padding-bottom: clamp(36px, 5vw, 64px);
  border-bottom: 1px solid var(--divider);
  background:
    radial-gradient(720px 320px at 18% 0%, var(--accent-soft), transparent 66%),
    transparent;
  overflow: hidden;
}
.crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .75rem;
  color: var(--text-3);
  margin-bottom: 20px;
}
.crumb a { color: var(--text-3); transition: color .18s var(--ease-standard); }
.crumb a:hover { color: var(--accent-text); }
.crumb span { opacity: .5; }

.page-hero h1 {
  font-size: clamp(2.1rem, 4.2vw, 3.5rem);
  font-weight: 660;
  line-height: 1.12;
  letter-spacing: -.028em;
  max-width: 18em;
}
.page-hero .lead { margin-top: 18px; max-width: 40em; }
.page-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}
.page-hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* ------------------------------------------------- 首页：三个入口卡 */
.entry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.entry {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px;
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  overflow: hidden;
  transition: transform .3s var(--ease-decel), box-shadow .3s var(--ease-standard),
              border-color .3s var(--ease-standard);
}
.entry:hover { transform: translateY(-4px); box-shadow: var(--shadow-8); border-color: var(--accent-ring); }
.entry__no {
  font-family: var(--font-num);
  font-size: .6875rem;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--accent-text);
}
.entry h3 { font-size: 1.125rem; font-weight: 650; }
.entry p { font-size: .875rem; color: var(--text-3); line-height: 1.75; }
.entry__go {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .8125rem;
  font-weight: 650;
  color: var(--accent-text);
}
.entry__go svg { width: 14px; height: 14px; transition: transform .3s var(--ease-decel); }
.entry:hover .entry__go svg { transform: translateX(4px); }
.entry__icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  color: var(--accent-text);
}
.entry__icon svg { width: 18px; height: 18px; }

/* ------------------------------------------------ 指标卡：文字版 */
.metric__val--word {
  font-size: 1.5rem;
  letter-spacing: -.01em;
  line-height: 1.2;
}

/* -------------------------------------------------------- 价格卡补充 */
.plan--compact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 18px;
  padding: 20px 22px;
}
.plan--compact .plan__head { padding: 0; border: 0; }
.plan--compact .plan__name { margin-top: 6px; font-size: 1rem; }
.plan--compact .plan__price { margin-top: 8px; }
.plan--compact .plan__price b { font-size: 1.7rem; }
.plan--compact .plan__time { margin-top: 4px; }
.plan--compact .plan__desc { font-size: .8125rem; color: var(--text-3); margin-top: 10px; line-height: 1.65; }
.plan--compact .plan__act { display: flex; flex-direction: column; gap: 8px; align-items: flex-end; }

.plan--feature-lg {
  grid-column: span 2;
  background:
    linear-gradient(180deg, var(--accent-soft) 0%, transparent 30%),
    var(--layer-1);
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow-8);
}
.plan--feature-lg .plan__name { font-size: 1.375rem; }
.plan--feature-lg .plan__price b { font-size: 2.75rem; }
.plan__cols {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 4px 20px;
  padding: 18px 0;
  border-top: 1px dashed var(--divider);
  margin-top: 18px;
}
.plan__cols li { font-size: .8125rem; color: var(--text-2); padding-left: 14px; position: relative; line-height: 1.7; }
.plan__cols li::before {
  content: "";
  position: absolute;
  left: 0; top: .62em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: .8;
}
.plan__disclaimer {
  margin-top: 18px;
  font-size: .75rem;
  color: var(--text-3);
  line-height: 1.7;
  max-width: 78ch;
}

/* ---------------------------------------------------- 售后矩阵表格 */
.matrix-wrap {
  overflow-x: auto;
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
}
.matrix {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  font-size: .8125rem;
}
.matrix th, .matrix td {
  padding: 16px 18px;
  text-align: left;
  border-bottom: 1px solid var(--divider);
  vertical-align: top;
  line-height: 1.65;
}
.matrix thead th {
  font-size: .6875rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-3);
  font-weight: 700;
  background: var(--layer-2);
  border-bottom: 1px solid var(--stroke);
  white-space: nowrap;
}
.matrix tbody tr:last-child td { border-bottom: 0; }
.matrix tbody tr:hover td { background: var(--layer-2); }
.matrix td:first-child { font-weight: 600; color: var(--text-1); min-width: 180px; }
.matrix .num { font-family: var(--font-num); font-weight: 650; color: var(--text-1); white-space: nowrap; }
.matrix .muted { color: var(--text-3); }

/* -------------------------------------------------- 交付清单（首页） */
.deliver {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.deliver li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 12px;
  padding: 16px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  font-size: .875rem;
  color: var(--text-2);
  line-height: 1.7;
}
.deliver b { display: block; color: var(--text-1); font-weight: 620; margin-bottom: 2px; }
.deliver svg { width: 20px; height: 20px; color: var(--accent); }

/* ------------------------------------------------------ 关于我 */
.about {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}
.about__card {
  position: sticky;
  top: 108px;
  padding: 26px;
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-4);
}
.about__avatar {
  width: 76px; height: 76px;
  border-radius: 22px;
  display: grid;
  place-items: center;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent-text);
  background: var(--accent-soft);
  border: 1px solid var(--accent-ring);
  margin-bottom: 18px;
}
.about__name { font-size: 1.125rem; font-weight: 680; color: var(--text-1); }
.about__role { font-size: .8125rem; color: var(--accent-text); font-weight: 600; margin-top: 4px; }
.about__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.about__meta { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--divider); display: grid; gap: 10px; }
.about__meta div { display: flex; justify-content: space-between; gap: 12px; font-size: .75rem; color: var(--text-3); }
.about__meta b { color: var(--text-1); font-family: var(--font-num); font-weight: 600; }
.about__story p { font-size: 1rem; line-height: 1.95; color: var(--text-2); }
.about__story p + p { margin-top: 20px; }
.about__story strong { color: var(--text-1); font-weight: 620; }
.about__pull {
  margin: 28px 0;
  padding: 22px 26px;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--accent-soft);
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text-1);
  font-weight: 550;
}

/* --------------------------------------------------- 微信 / 抖音 CTA */
.qr-card {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
  align-items: center;
  padding: clamp(22px, 3vw, 32px);
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-4);
}
.qr-card__img {
  padding: 10px;
  border-radius: var(--r-md);
  background: #fff;
  border: 1px solid var(--divider);
}
.qr-card__img img { width: 100%; height: auto; display: block; border-radius: 6px; }
.qr-card h3 { font-size: 1.25rem; margin-bottom: 8px; }
.qr-card p { font-size: .875rem; color: var(--text-3); line-height: 1.75; }
.qr-card__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
}
.wx-id {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 42px;
  padding: 0 6px 0 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke-strong);
  background: var(--layer-2);
  font-family: var(--font-num);
  font-size: .9375rem;
  font-weight: 650;
  color: var(--text-1);
  letter-spacing: .02em;
}
.wx-id button {
  height: 30px;
  padding: 0 12px;
  border-radius: var(--r-sm);
  background: var(--accent);
  color: #fff;
  font-size: .75rem;
  font-weight: 650;
  transition: background-color var(--d-1) var(--ease-standard);
}
:root[data-theme="dark"] .wx-id button { color: #04222E; }
.wx-id button:hover { background: var(--accent-hover); }

.send-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 24px;
  margin-top: 22px;
}
.send-list li {
  position: relative;
  padding-left: 18px;
  font-size: .875rem;
  color: var(--text-2);
  line-height: 1.8;
}
.send-list li::before {
  content: "";
  position: absolute;
  left: 0; top: .72em;
  width: 6px; height: 6px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
}

/* --------------------------------------------------- 系统版本卡 */
.version-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.version {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  transition: transform .3s var(--ease-decel), box-shadow .3s var(--ease-standard),
              border-color .3s var(--ease-standard);
}
.version:hover { transform: translateY(-3px); box-shadow: var(--shadow-4); border-color: var(--accent-ring); }
.version--lead {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow-4);
  background: linear-gradient(180deg, var(--accent-soft), transparent 60%), var(--layer-1);
}
.version__top { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.version__name { font-size: 1rem; font-weight: 650; color: var(--text-1); line-height: 1.4; }
.version__tag {
  flex: none;
  height: 22px;
  padding: 0 9px;
  border-radius: var(--r-pill);
  background: var(--accent-soft);
  color: var(--accent-text);
  font-size: .6875rem;
  font-weight: 650;
  display: inline-flex;
  align-items: center;
  white-space: nowrap;
}
.version__note { font-size: .75rem; color: var(--text-3); line-height: 1.65; }
.version__go {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: .8125rem;
  font-weight: 650;
  color: var(--accent-text);
}
.version__go svg { width: 14px; height: 14px; transition: transform .3s var(--ease-decel); }
.version:hover .version__go svg { transform: translateX(3px); }

/* --------------------------------------------------- 两种部署方式 */
.compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.compare__card {
  padding: 26px;
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
}
.compare__card--main {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow-4);
  background: linear-gradient(180deg, var(--accent-soft), transparent 42%), var(--layer-1);
}
.compare__head { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.compare__head h3 { font-size: 1.0625rem; }
.compare__card p { font-size: .875rem; color: var(--text-3); line-height: 1.8; }
.compare__list { display: grid; gap: 9px; margin-top: 16px; }
.compare__list li {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 10px;
  font-size: .8125rem;
  color: var(--text-2);
  line-height: 1.65;
}
.compare__list svg { width: 16px; height: 16px; margin-top: 2px; color: var(--accent); }
.compare__list .is-off svg { color: var(--text-4); }

/* --------------------------------------------------------- 软件专区 */
.sw-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.sw-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 24px;
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  transition: transform .3s var(--ease-decel), box-shadow .3s var(--ease-standard),
              border-color .3s var(--ease-standard);
}
.sw-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-8); border-color: var(--accent-ring); }
.sw-card__top { display: flex; align-items: center; gap: 14px; }
.sw-card__icon {
  width: 52px; height: 52px;
  border-radius: 15px;
  overflow: hidden;
  flex: none;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  border: 1px solid var(--stroke);
}
.sw-card__icon img { width: 100%; height: 100%; object-fit: cover; }
.sw-card__icon svg { width: 24px; height: 24px; color: var(--accent-text); }
.sw-card__title { font-size: 1.0625rem; font-weight: 650; color: var(--text-1); }
.sw-card__en {
  font-family: var(--font-num);
  font-size: .625rem;
  letter-spacing: .16em;
  color: var(--text-4);
  text-transform: uppercase;
  margin-top: 2px;
}
.sw-card__price {
  margin-left: auto;
  height: 26px;
  padding: 0 10px;
  border-radius: var(--r-pill);
  display: inline-flex;
  align-items: center;
  font-size: .75rem;
  font-weight: 700;
  font-family: var(--font-num);
  background: var(--accent-soft);
  color: var(--accent-text);
  flex: none;
}
.sw-card__price--paid { background: rgba(242, 176, 30, .16); color: #8A6100; }
:root[data-theme="dark"] .sw-card__price--paid { color: #F2B01E; }
.sw-card__desc { font-size: .875rem; color: var(--text-3); line-height: 1.75; }
.sw-card__feat { display: grid; gap: 7px; }
.sw-card__feat li {
  display: flex;
  gap: 9px;
  font-size: .8125rem;
  color: var(--text-2);
  line-height: 1.6;
}
.sw-card__feat li::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: .58em;
  flex: none;
}
.sw-card__foot {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed var(--divider);
  display: flex;
  align-items: center;
  gap: 10px;
}
.sw-card__ver { font-size: .75rem; color: var(--text-4); font-family: var(--font-num); margin-right: auto; }

/* 软件详情（左右交替） */
.sw-detail {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: center;
  padding-block: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--divider);
}
.sw-detail:nth-child(even) .sw-detail__media { order: 2; }
.sw-detail__head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.sw-detail__head img { width: 40px; height: 40px; border-radius: 11px; border: 1px solid var(--stroke); }
.sw-detail h3 { font-size: 1.375rem; }
.sw-detail p { font-size: .9375rem; color: var(--text-2); line-height: 1.85; }
.sw-detail__specs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.sw-detail__hash {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: var(--r-md);
  background: var(--layer-2);
  border: 1px solid var(--stroke);
  font-family: var(--font-num);
  font-size: .6875rem;
  line-height: 1.6;
  color: var(--text-3);
  word-break: break-all;
}
.sw-detail__hash b { color: var(--text-2); font-weight: 600; }
.sw-detail__media {
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: var(--layer-2);
  box-shadow: var(--shadow-4);
  overflow: hidden;
}
.sw-detail__media img { width: 100%; display: block; }

/* ------------------------------------------------- 优化清单筛选器 */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}
.search {
  position: relative;
  flex: 1 1 260px;
  max-width: 360px;
}
.search input {
  width: 100%;
  height: 42px;
  padding: 0 14px 0 40px;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke-strong);
  background: var(--layer-1);
  font-size: .875rem;
  color: var(--text-1);
  transition: border-color .2s var(--ease-standard), box-shadow .2s var(--ease-standard);
}
.search input::placeholder { color: var(--text-4); }
.search input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-ring);
}
.search svg {
  position: absolute;
  left: 13px; top: 50%;
  transform: translateY(-50%);
  width: 16px; height: 16px;
  color: var(--text-4);
  pointer-events: none;
}
.filter-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.fchip {
  height: 32px;
  padding: 0 12px;
  border-radius: var(--r-pill);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-3);
  transition: all .18s var(--ease-standard);
}
.fchip:hover { color: var(--text-1); border-color: var(--stroke-strong); }
.fchip.is-on {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
:root[data-theme="dark"] .fchip.is-on { color: #04222E; }
.opt-count {
  margin-left: auto;
  font-size: .75rem;
  color: var(--text-3);
  font-family: var(--font-num);
}
.opt-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 60px;
}
.opt-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px 7px 10px;
  border-radius: var(--r-sm);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  font-size: .75rem;
  color: var(--text-2);
  line-height: 1.5;
  transition: border-color .18s var(--ease-standard), color .18s var(--ease-standard),
              background-color .18s var(--ease-standard);
}
.opt-item:hover { border-color: var(--accent-ring); color: var(--text-1); }
.opt-item::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: .75;
  flex: none;
}
.opt-item[data-cat="safe"]::before { background: var(--danger); opacity: .9; }
.opt-item[data-cat="update"]::before { background: #B8860B; opacity: .9; }
.opt-empty {
  padding: 28px;
  border-radius: var(--r-md);
  border: 1px dashed var(--stroke-strong);
  color: var(--text-3);
  font-size: .875rem;
  text-align: center;
  width: 100%;
}
.opt-group { margin-top: 22px; }
.opt-group__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--divider);
}
.opt-group__head h4 { font-size: .9375rem; }
.opt-group__head span { font-size: .75rem; color: var(--text-3); }
.opt-group__head em {
  margin-left: auto;
  font-style: normal;
  font-family: var(--font-num);
  font-size: .75rem;
  color: var(--text-4);
}

/* --------------------------------------------------------- 提示条 */
.notice {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 14px;
  padding: 18px 20px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(196, 43, 28, .22);
  background: rgba(196, 43, 28, .05);
  font-size: .8125rem;
  line-height: 1.8;
  color: var(--text-2);
}
:root[data-theme="dark"] .notice {
  border-color: rgba(255, 128, 116, .28);
  background: rgba(255, 128, 116, .07);
}
.notice svg { width: 20px; height: 20px; color: var(--danger); margin-top: 2px; }
.notice b { color: var(--text-1); }
.notice--info {
  border-color: var(--accent-ring);
  background: var(--accent-soft);
}
.notice--info svg { color: var(--accent-text); }

/* ------------------------------------------------------- 页脚补充 */
.footer__brand .brand__sub { letter-spacing: .16em; }

/* ------------------------------------------------------- 响应式补充 */
@media (max-width: 1080px) {
  .entry-grid { grid-template-columns: 1fr; }
  .version-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .about { grid-template-columns: 1fr; }
  .about__card { position: static; }
}

@media (max-width: 900px) {
  .compare { grid-template-columns: 1fr; }
  .sw-grid { grid-template-columns: 1fr; }
  .sw-detail { grid-template-columns: 1fr; }
  .sw-detail:nth-child(even) .sw-detail__media { order: 0; }
  .plan--compact { grid-template-columns: 1fr; }
  .plan--compact .plan__act { align-items: stretch; flex-direction: row; }
  .plan--compact .plan__act .btn { flex: 1; }
  .plan--feature-lg { grid-column: auto; }
  .qr-card { grid-template-columns: 1fr; }
  .qr-card__img { max-width: 200px; }
  .deliver { grid-template-columns: 1fr; }
  .send-list { grid-template-columns: 1fr; }
  .plan__cols { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .version-grid { grid-template-columns: 1fr; }
  .opt-count { margin-left: 0; width: 100%; }
  .page-hero { padding-top: 108px; }
}


/* =========================================================================
   v4 组件：入口轮播 / 技术刻度带 / 五层链路 / 场景卡 / 对比表 / 版本卡 v2
   ========================================================================= */

/* ------------------------------------------------ 首页 Hero 增强 */
.hero .display {
  font-size: clamp(2.5rem, 5.1vw, 4.7rem);
  letter-spacing: -.035em;
}
.hero__trust {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--divider);
  max-width: 560px;
}
.hero__trust div {
  padding-right: 12px;
  border-left: 1px solid var(--divider);
  padding-left: 14px;
}
.hero__trust div:first-child { border-left: 0; padding-left: 0; }
.hero__trust b {
  display: block;
  font-family: var(--font-num);
  font-size: 1.5rem;
  font-weight: 680;
  color: var(--text-1);
  line-height: 1.1;
  letter-spacing: -.02em;
}
.hero__trust span {
  display: block;
  margin-top: 4px;
  font-size: .6875rem;
  color: var(--text-3);
  letter-spacing: .04em;
}

/* 卡片背后的装饰环 */
.hero__visual::before,
.hero__visual::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--stroke);
  pointer-events: none;
}
.hero__visual { position: relative; }
.hero__visual::before { inset: -8% -12% -8% -6%; opacity: .7; }
.hero__visual::after { inset: 4% -4% 4% 2%; opacity: .45; }

/* ------------------------------------------------ 技术刻度带（替代跑马灯） */
.spec-strip {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--divider);
  border-bottom: 1px solid var(--divider);
  background: color-mix(in srgb, var(--layer-1) 62%, transparent);
}
.spec-strip__inner {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  max-width: none;
  padding-inline: 0;
}
.spec-strip__cell {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px clamp(12px, 2vw, 26px);
  border-left: 1px solid var(--divider);
  white-space: nowrap;
  overflow: hidden;
}
.spec-strip__cell:first-child { border-left: 0; }
.spec-strip__cell svg { width: 15px; height: 15px; color: var(--accent); flex: none; }
.spec-strip__cell b {
  font-size: .8125rem;
  font-weight: 620;
  color: var(--text-1);
  letter-spacing: .01em;
}
.spec-strip__cell small {
  font-size: .625rem;
  color: var(--text-4);
  font-family: var(--font-num);
  letter-spacing: .1em;
  margin-left: auto;
}
.spec-strip__sweep {
  position: absolute;
  top: 0; bottom: 0;
  width: 220px;
  left: -240px;
  background: linear-gradient(90deg, transparent, rgba(0, 103, 192, .10), transparent);
  animation: sweep 9s linear infinite;
  pointer-events: none;
}
:root[data-theme="dark"] .spec-strip__sweep {
  background: linear-gradient(90deg, transparent, rgba(76, 194, 255, .12), transparent);
}
@keyframes sweep {
  0% { transform: translateX(0); }
  100% { transform: translateX(calc(100vw + 240px)); }
}
:root[data-motion="reduced"] .spec-strip__sweep { display: none; }

/* ------------------------------------------------ 入口轮播 */
.showcase {
  position: relative;
  border-radius: var(--r-2xl);
  border: 1px solid var(--stroke);
  background:
    linear-gradient(150deg, var(--accent-soft) 0%, transparent 46%),
    var(--layer-1);
  box-shadow: var(--shadow-8);
  overflow: hidden;
}
.showcase__viewport { position: relative; min-height: 440px; }
/* 轮播：非当前屏直接 display:none，物理上不可能出现两屏叠加 */
.slide {
  position: absolute;
  inset: 0;
  display: none;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
  gap: clamp(24px, 3vw, 48px);
  align-items: center;
  padding: clamp(28px, 3.4vw, 46px);
}
.slide.is-active {
  display: grid;
}
/* 只让内容动，不让两屏交叉淡入 */
.slide.is-active .slide__body,
.slide.is-active .slide__art {
  animation: slideIn .5s var(--ease-decel) both;
}
.slide.is-active .slide__art { animation-delay: .07s; }
@keyframes slideIn {
  from { opacity: 0; transform: translateX(26px); }
  to { opacity: 1; transform: none; }
}

.slide__no {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-num);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--accent-text);
  margin-bottom: 14px;
}
.slide__no em { font-style: normal; color: var(--text-4); font-weight: 600; }
.slide h3 {
  font-size: clamp(1.6rem, 2.6vw, 2.1rem);
  font-weight: 660;
  letter-spacing: -.024em;
  line-height: 1.2;
  margin-bottom: 12px;
}
.slide p { font-size: .9375rem; color: var(--text-2); line-height: 1.85; max-width: 34em; }
.slide__points {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.slide__points span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 11px;
  border-radius: var(--r-pill);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  font-size: .75rem;
  font-weight: 600;
  color: var(--text-2);
}
.slide__points svg { width: 12px; height: 12px; color: var(--accent); }
.slide__cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 24px; }

/* 轮播右侧视觉 */
.slide__art {
  position: relative;
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: color-mix(in srgb, var(--layer-1) 84%, transparent);
  box-shadow: var(--shadow-4);
  padding: 20px;
  overflow: hidden;
}
.slide__art::after {
  content: "";
  position: absolute; inset: 0;
  background-image: radial-gradient(var(--stroke-strong) 1px, transparent 1px);
  background-size: 18px 18px;
  opacity: .45;
  pointer-events: none;
  mask-image: radial-gradient(circle at 70% 20%, #000, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 70% 20%, #000, transparent 70%);
}

/* 视觉 A：参数面板 */
.art-board { display: grid; gap: 10px; position: relative; z-index: 1; }
.art-board__row {
  display: grid;
  grid-template-columns: 64px 1fr 48px;
  align-items: center;
  gap: 10px;
  font-size: .6875rem;
  color: var(--text-3);
  font-family: var(--font-num);
}
.art-board__track {
  height: 6px;
  border-radius: 3px;
  background: var(--layer-3);
  overflow: hidden;
}
.art-board__track i {
  display: block; height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), #6FCBFF);
  width: var(--w, 60%);
}
.art-board__top {
  display: flex; align-items: center; justify-content: space-between;
  padding-bottom: 12px; margin-bottom: 4px;
  border-bottom: 1px dashed var(--divider);
  position: relative; z-index: 1;
}
.art-board__top b {
  font-family: var(--font-num); font-size: 1.75rem; font-weight: 680;
  color: var(--text-1); letter-spacing: -.02em;
}
.art-board__top span { font-size: .6875rem; color: var(--text-3); letter-spacing: .08em; }

/* 视觉 B：窗口叠层 */
.art-stack { position: relative; height: 240px; }
.art-stack__win {
  position: absolute;
  border-radius: 10px;
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-4);
  overflow: hidden;
}
.art-stack__win:nth-child(1) { inset: 8px 60px 96px 12px; opacity: .55; }
.art-stack__win:nth-child(2) { inset: 34px 32px 60px 40px; opacity: .8; }
.art-stack__win:nth-child(3) { inset: 64px 6px 20px 78px; }
.art-stack__bar {
  display: flex; gap: 4px; padding: 7px 8px;
  border-bottom: 1px solid var(--divider);
  background: var(--layer-2);
}
.art-stack__bar i { width: 5px; height: 5px; border-radius: 50%; background: var(--divider); }
.art-stack__body { padding: 10px; display: grid; gap: 6px; }
.art-stack__body span { height: 6px; border-radius: 3px; background: var(--layer-3); }
.art-stack__body span:nth-child(1) { width: 62%; background: var(--accent-soft-2); }
.art-stack__body span:nth-child(2) { width: 84%; }
.art-stack__body span:nth-child(3) { width: 48%; }

/* 视觉 C：版本堆叠 */
.art-vers { position: relative; height: 240px; }
.art-vers__card {
  position: absolute;
  left: var(--x, 0);
  top: var(--y, 0);
  width: 190px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  font-size: .625rem;
  font-family: var(--font-num);
  color: var(--text-3);
  letter-spacing: .04em;
}
.art-vers__card b { display: block; font-size: .75rem; color: var(--text-1); letter-spacing: 0; margin-top: 2px; }
.art-vers__card.is-lead { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow-4); }

/* 轮播控制 */
.showcase__nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 14px clamp(20px, 3vw, 30px) 18px;
  border-top: 1px solid var(--divider);
  background: color-mix(in srgb, var(--layer-2) 60%, transparent);
}
.showcase__bar {
  position: relative;
  flex: 1;
  height: 3px;
  border-radius: 2px;
  background: var(--stroke-strong);
  overflow: hidden;
  padding: 0;
  cursor: pointer;
}
.showcase__bar i {
  display: block;
  height: 100%;
  border-radius: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
}
.showcase__bar.is-on i { animation: barFill 7s linear forwards; }
.showcase__bar.is-done i { transform: scaleX(1); }
@keyframes barFill { from { transform: scaleX(0); } to { transform: scaleX(1); } }
:root[data-motion="reduced"] .showcase__bar.is-on i { animation: none; transform: scaleX(1); }
.showcase__arrow {
  flex: none;
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--stroke-strong);
  background: var(--layer-1);
  color: var(--text-2);
  transition: all .18s var(--ease-standard);
}
.showcase__arrow:hover { color: var(--accent-text); border-color: var(--accent-ring); transform: translateY(-1px); }
.showcase__arrow svg { width: 14px; height: 14px; }

/* ------------------------------------------------ 五层链路 */
.chain { position: relative; padding: 30px 0 10px; }
.chain__rail {
  position: absolute;
  left: 6%; right: 6%;
  top: 44px;
  height: 1px;
  background: var(--divider);
  overflow: hidden;
}
.chain__rail i {
  display: block; height: 100%;
  background: linear-gradient(90deg, var(--accent), #6FCBFF);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 1.2s var(--ease-decel);
}
.chain.is-in .chain__rail i { transform: scaleX(1); }
.chain__nodes {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  position: relative;
}
.chain__node { text-align: center; padding: 0 8px; }
.chain__dot {
  display: grid;
  place-items: center;
  width: 30px; height: 30px;
  margin: 0 auto 14px;
  border-radius: 50%;
  border: 1px solid var(--stroke-strong);
  background: var(--layer-1);
  color: var(--text-4);
  transition: all .4s var(--ease-decel);
  transition-delay: calc(var(--i, 0) * 120ms);
}
.chain__dot svg { width: 14px; height: 14px; }
.chain.is-in .chain__dot {
  border-color: var(--accent);
  color: var(--accent-text);
  box-shadow: 0 0 0 4px var(--accent-ring);
}
.chain__node b {
  display: block;
  font-size: .875rem;
  color: var(--text-1);
  font-weight: 620;
}
.chain__node small {
  display: block;
  margin-top: 6px;
  font-size: .75rem;
  color: var(--text-3);
  line-height: 1.65;
}

/* ------------------------------------------------ 场景卡 */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.scenario {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 16px;
  padding: 22px 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  transition: transform .3s var(--ease-decel), border-color .3s var(--ease-standard),
              box-shadow .3s var(--ease-standard);
}
.scenario:hover { transform: translateY(-3px); border-color: var(--accent-ring); box-shadow: var(--shadow-4); }
.scenario__icon {
  width: 42px; height: 42px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: var(--accent-soft);
  color: var(--accent-text);
}
.scenario__icon svg { width: 19px; height: 19px; }
.scenario h4 { font-size: 1rem; margin-bottom: 6px; }
.scenario p { font-size: .8125rem; color: var(--text-3); line-height: 1.75; }

/* ------------------------------------------------ 三个支柱 */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.pillar {
  position: relative;
  padding: 26px 24px;
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  overflow: hidden;
}
.pillar::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--accent), transparent);
  opacity: .8;
}
.pillar__no {
  font-family: var(--font-num);
  font-size: .6875rem;
  letter-spacing: .18em;
  color: var(--accent-text);
  font-weight: 700;
}
.pillar h4 { margin: 10px 0 8px; font-size: 1.0625rem; }
.pillar p { font-size: .875rem; color: var(--text-3); line-height: 1.8; }

/* ------------------------------------------------ 七个坑 */
.pitfall-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.pitfall {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 12px;
  padding: 18px 20px;
  border-radius: var(--r-md);
  border: 1px dashed var(--stroke-strong);
  background: color-mix(in srgb, var(--layer-1) 60%, transparent);
  font-size: .875rem;
  color: var(--text-2);
  line-height: 1.75;
}
.pitfall svg { width: 18px; height: 18px; color: var(--danger); margin-top: 2px; }
.pitfall b { color: var(--text-1); font-weight: 620; }

/* ------------------------------------------------ 七档对比表 */
.cmp { width: 100%; min-width: 820px; border-collapse: collapse; font-size: .8125rem; }
.cmp th, .cmp td { padding: 14px 16px; border-bottom: 1px solid var(--divider); text-align: left; vertical-align: middle; }
.cmp thead th {
  font-size: .6875rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--text-3); font-weight: 700; background: var(--layer-2);
  white-space: nowrap;
}
.cmp tbody tr:last-child td { border-bottom: 0; }
.cmp tbody tr:hover td { background: var(--layer-2); }
.cmp td:first-child { font-weight: 600; color: var(--text-1); }
.cmp .price { font-family: var(--font-num); font-weight: 700; color: var(--accent-text); font-size: .9375rem; white-space: nowrap; }
.cmp .yes { color: var(--ok); }
.cmp .no { color: var(--text-4); }

/* ------------------------------------------------ 版本卡 v2 */
.version--v2 {
  padding: 0;
  overflow: hidden;
}
.version__head {
  padding: 22px 22px 16px;
  border-bottom: 1px solid var(--divider);
  background: color-mix(in srgb, var(--layer-2) 55%, transparent);
}
.version__win {
  font-family: var(--font-num);
  font-size: .625rem;
  letter-spacing: .16em;
  color: var(--text-4);
  text-transform: uppercase;
}
.version__big {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: 6px;
  font-family: var(--font-num);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--text-1);
  line-height: 1.1;
}
.version__big em { font-style: normal; font-size: .875rem; font-weight: 600; color: var(--text-3); letter-spacing: 0; }
.version__body { padding: 16px 22px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.version__name-v2 {
  font-size: .8125rem;
  font-weight: 600;
  color: var(--text-2);
  line-height: 1.5;
}
.version__go-v2 {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  height: 38px;
  padding: 0 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke-strong);
  background: var(--layer-1);
  font-size: .8125rem;
  font-weight: 650;
  color: var(--text-1);
  transition: all .2s var(--ease-standard);
}
.version--lead .version__go-v2,
.version:hover .version__go-v2 {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
:root[data-theme="dark"] .version--lead .version__go-v2,
:root[data-theme="dark"] .version:hover .version__go-v2 { color: #04222E; }
.version__go-v2 svg { width: 14px; height: 14px; }

/* ------------------------------------------------ 软件轮播 */
.sw-showcase .showcase__viewport { min-height: 380px; }
.sw-showcase .slide { grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); }
.sw-shot {
  position: relative;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: var(--layer-2);
  overflow: hidden;
  box-shadow: var(--shadow-4);
}
.sw-shot img { width: 100%; height: auto; display: block; }
.sw-shot__tag {
  position: absolute;
  left: 10px; top: 10px;
  height: 22px;
  padding: 0 9px;
  border-radius: var(--r-pill);
  background: rgba(0, 0, 0, .55);
  color: #fff;
  font-size: .625rem;
  font-weight: 650;
  display: inline-flex;
  align-items: center;
  backdrop-filter: blur(6px);
}

/* ------------------------------------------------ 响应式补充 */
@media (max-width: 1080px) {
  .spec-strip__inner { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .spec-strip__cell:nth-child(n+7) { display: none; }
  .slide { grid-template-columns: 1fr; }
  .slide__art { display: none; }
  .showcase__viewport { min-height: 420px; }
  .chain__nodes { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .chain__node small { display: none; }
  .pillars { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .hero__trust { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 0; }
  .scenario-grid { grid-template-columns: 1fr; }
  .pitfall-list { grid-template-columns: 1fr; }
  .showcase__viewport { min-height: 460px; }
  .slide { padding: 24px 22px; }
}

@media (max-width: 640px) {
  .spec-strip__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .spec-strip__cell:nth-child(n+5) { display: none; }
  .showcase__viewport { min-height: 560px; }
  .slide h3 { font-size: 1.5rem; }
  .chain__nodes { grid-template-columns: repeat(5, 1fr); }
  .chain__node b { font-size: .75rem; }
  .chain__dot { width: 24px; height: 24px; }
}


/* =========================================================================
   v5：全屏轮播 / 价格右侧图标 / 公告栏 / 头像
   ========================================================================= */

/* ------------------------------------------------ 全屏轮播 */
.showcase--full {
  width: 100vw;
  margin-left: calc(50% - 50vw);
  border-radius: 0;
  border-left: 0;
  border-right: 0;
  border-top: 1px solid var(--stroke);
  border-bottom: 1px solid var(--stroke);
  box-shadow: none;
  background:
    radial-gradient(900px 420px at 22% -10%, var(--accent-soft) 0%, transparent 62%),
    var(--layer-1);
}
.showcase--full .showcase__viewport { min-height: 600px; }
.showcase--full .slide {
  padding: clamp(36px, 4.4vw, 64px) max(24px, calc((100vw - 1200px) / 2 + 24px));
  gap: clamp(28px, 4vw, 64px);
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
}
.showcase--full .slide h3 { font-size: clamp(1.9rem, 3.3vw, 2.7rem); }
.showcase--full .slide p { font-size: 1.0625rem; line-height: 1.9; max-width: 32em; }
.showcase--full .slide__art { min-height: 360px; display: flex; align-items: center; justify-content: center; }
.showcase--full .showcase__nav {
  padding: 16px max(24px, calc((100vw - 1200px) / 2 + 24px)) 20px;
  border-top: 1px solid var(--divider);
}
.showcase--full .art-stack,
.showcase--full .art-vers { height: 320px; }
.showcase--full .art-vers__card { width: 230px; }

/* 软件轮播：略矮一点 */
.sw-showcase.showcase--full .showcase__viewport { min-height: 540px; }
.sw-showcase.showcase--full .slide h3 { font-size: clamp(1.7rem, 2.8vw, 2.3rem); }

/* ------------------------------------------------ 价格区（标题 + 右侧图标） */
.price-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: clamp(24px, 3vw, 44px);
  align-items: start;
}
.price-head .section-head { max-width: none; }
.price-icons { display: grid; gap: 10px; }
.price-icons div {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  font-size: .8125rem;
  font-weight: 600;
  color: var(--text-2);
}
.price-icons svg { width: 18px; height: 18px; color: var(--accent-text); flex: none; }
.price-icons span em {
  display: block;
  font-style: normal;
  font-weight: 500;
  font-size: .6875rem;
  color: var(--text-4);
  margin-top: 2px;
  font-family: var(--font-num);
  letter-spacing: .04em;
}

/* 小贵声明：放到价格表上方 */
.claim {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  padding: 18px 24px;
  border-radius: var(--r-lg);
  border: 1px solid var(--accent-ring);
  background: var(--accent-soft);
}
.claim b {
  font-size: clamp(1.25rem, 2vw, 1.6rem);
  font-weight: 680;
  letter-spacing: -.02em;
  color: var(--text-1);
}
.claim span { font-size: .875rem; color: var(--text-2); }

/* ------------------------------------------------ 公告栏（软件专区右侧） */
.sw-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 22px;
  align-items: start;
}
.announce {
  position: sticky;
  top: 100px;
  padding: 20px;
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
}
.announce__head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--divider);
}
.announce__head svg { width: 16px; height: 16px; color: var(--accent-text); }
.announce__head b { font-size: .8125rem; font-weight: 700; color: var(--text-1); letter-spacing: .02em; }
.announce__head em {
  margin-left: auto;
  font-style: normal;
  font-size: .625rem;
  color: var(--text-4);
  font-family: var(--font-num);
}
.announce ul { display: grid; gap: 12px; }
.announce li { padding-bottom: 12px; border-bottom: 1px dashed var(--divider); }
.announce li:last-child { border-bottom: 0; padding-bottom: 0; }
.announce li time {
  display: block;
  font-size: .625rem;
  color: var(--text-4);
  font-family: var(--font-num);
  letter-spacing: .06em;
  margin-bottom: 4px;
}
.announce li b { display: block; font-size: .8125rem; color: var(--text-1); font-weight: 620; line-height: 1.5; }
.announce li p { font-size: .75rem; color: var(--text-3); line-height: 1.65; margin-top: 4px; }
.announce__more {
  display: block;
  margin-top: 14px;
  font-size: .75rem;
  font-weight: 650;
  color: var(--accent-text);
}

/* ------------------------------------------------ 头像 */
.brand__mark--avatar { background: none; box-shadow: 0 2px 8px rgba(16,32,56,.16); overflow: hidden; }
.brand__mark--avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.about__avatar--img { padding: 0; overflow: hidden; background: none; }
.about__avatar--img img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* ------------------------------------------------ 画质助手购买入口 */
.buy-inline {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  margin-top: 16px;
  padding: 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--accent-ring);
  background: var(--accent-soft);
}
.buy-inline img { width: 120px; height: 120px; border-radius: 8px; background: #fff; display: block; }
.buy-inline b { display: block; font-size: .9375rem; color: var(--text-1); margin-bottom: 4px; }
.buy-inline p { font-size: .8125rem; color: var(--text-2); line-height: 1.7; }
.buy-inline .row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }

/* ------------------------------------------------ 响应式 */
@media (max-width: 1080px) {
  .price-head { grid-template-columns: 1fr; }
  .price-icons { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sw-layout { grid-template-columns: 1fr; }
  .announce { position: static; }
  .showcase--full .slide { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .showcase--full .showcase__viewport { min-height: 520px; }
  .showcase--full .slide { padding: 26px 20px; }
  .showcase--full .slide h3 { font-size: 1.6rem; }
  .showcase--full .slide p { font-size: .9375rem; }
  .showcase--full .showcase__nav { padding: 14px 20px 16px; }
  .buy-inline { grid-template-columns: 1fr; }
  .buy-inline img { width: 100%; max-width: 160px; height: auto; }
}

@media (max-width: 640px) {
  .showcase--full .showcase__viewport { min-height: 560px; }
  .claim { padding: 14px 16px; }
  .claim b { font-size: 1.25rem; }
}

/* 软件专区：卡片 + 右侧公告 */
.sw-with-rail {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 22px;
  align-items: start;
}
.sw-with-rail > .sw-grid { order: 1; }
.sw-with-rail > .announce { order: 2; }

@media (max-width: 1080px) {
  .sw-with-rail { grid-template-columns: 1fr; }
  .sw-with-rail > .announce { order: 2; }
}
/* 轮播：真实截图叠层 */
.art-shots { position: relative; width: 100%; height: 340px; }
.art-shots img {
  position: absolute;
  border-radius: 10px;
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow-8);
  background: #fff;
}
.art-shots__a { width: 78%; left: 0; top: 6px; transform: rotate(-1.2deg); }
.art-shots__b { width: 60%; right: 0; bottom: 0; transform: rotate(1.4deg); }
@media (max-width: 1080px) { .art-shots { height: 280px; } }
/* ------------------------------------------------ 复购记录循环轮播 */
.proof-strip {
  position: relative;
  overflow: hidden;
  padding: 10px 0 6px;
  mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 5%, #000 95%, transparent);
}
.proof-track {
  --step: 248px;          /* 一张卡宽度 232 + 间距 16 */
  display: flex;
  gap: 0;
  width: max-content;
  animation: proofScroll 22s linear infinite;
}

@keyframes proofScroll {
  from { transform: translateX(0); }
  to { transform: translateX(calc(-6 * var(--step))); }
}
.proof-card {
  flex: none;
  width: 232px;
  margin: 0 16px 0 0;
  border-radius: 14px;
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-4);
  overflow: hidden;
}
.proof-card img { width: 100%; height: 360px; object-fit: cover; object-position: top center; display: block; }
.proof-card figcaption {
  padding: 9px 10px;
  font-size: .6875rem;
  color: var(--text-3);
  text-align: center;
  border-top: 1px solid var(--divider);
}
:root[data-motion="reduced"] .proof-track { animation: none; }

@media (max-width: 640px) {
  .proof-card { width: 176px; }
  .proof-track { --step: 192px; }
  .proof-card img { height: 280px; }
}
/* ------------------------------------------------ 子页 Hero：左文右图 */
.page-hero--split { padding-bottom: clamp(28px, 4vw, 56px); }
.page-hero--split .page-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
  gap: clamp(28px, 4vw, 60px);
  align-items: center;
}
.page-hero__copy .crumb { margin-bottom: 18px; }

.page-hero__art { position: relative; }
.hero-shot {
  position: relative;
  margin: 0;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--stroke-strong);
  background: #fff;
  box-shadow: 0 18px 50px rgba(16, 32, 56, .16);
}
.hero-shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: 74% 20%;
}
.hero-shot::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 42%;
  background: linear-gradient(180deg, rgba(255,255,255,0), rgba(255,255,255,.94) 78%);
  pointer-events: none;
}
.hero-shot figcaption {
  position: absolute;
  left: 18px;
  bottom: 14px;
  z-index: 1;
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.hero-shot figcaption span {
  font-size: .8125rem;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: .02em;
}
.hero-shot figcaption em {
  font-style: normal;
  font-family: var(--font-num);
  font-size: .625rem;
  letter-spacing: .16em;
  color: var(--text-4);
}
.hero-shot__badge {
  position: absolute;
  right: -10px;
  top: -14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 30px;
  padding: 0 12px;
  border-radius: var(--r-pill);
  background: var(--layer-1);
  border: 1px solid var(--accent-ring);
  box-shadow: var(--shadow-4);
  font-size: .6875rem;
  font-weight: 650;
  color: var(--accent-text);
  white-space: nowrap;
}
.hero-shot__badge svg { width: 12px; height: 12px; }

@media (max-width: 1080px) {
  .page-hero--split .page-hero__grid { grid-template-columns: 1fr; }
  .page-hero__art { max-width: 620px; }
  .hero-shot__badge { right: 10px; top: -12px; }
}
/* 页头右侧的小公告 */
.announce--compact {
  position: static;
  padding: 16px 18px;
  border-radius: var(--r-lg);
  max-width: 340px;
  margin-left: auto;
}
.announce--compact .announce__head {
  padding-bottom: 10px;
  margin-bottom: 10px;
}
.announce--compact .announce__head b { font-size: .75rem; }
.announce--compact .announce__head svg { width: 14px; height: 14px; }
.announce--compact ul { gap: 10px; }
.announce--compact li { padding-bottom: 10px; }
.announce--compact li time { font-size: .5625rem; margin-bottom: 2px; }
.announce--compact li b { font-size: .75rem; line-height: 1.45; }
.announce--compact li p { font-size: .6875rem; line-height: 1.6; margin-top: 3px; }
.announce--compact .announce__more { margin-top: 10px; font-size: .6875rem; }

@media (max-width: 1080px) {
  .announce--compact { margin-left: 0; max-width: 100%; }
}
/* 公告页空状态 */
.empty-state {
  max-width: 620px;
  margin: 0 auto;
  padding: clamp(40px, 6vw, 72px) clamp(24px, 4vw, 48px);
  border-radius: var(--r-2xl);
  border: 1px dashed var(--stroke-strong);
  background: color-mix(in srgb, var(--layer-1) 70%, transparent);
  text-align: center;
}
.empty-state__icon {
  display: grid;
  place-items: center;
  width: 64px; height: 64px;
  margin: 0 auto 22px;
  border-radius: 18px;
  background: var(--accent-soft);
  color: var(--accent-text);
}
.empty-state__icon svg { width: 28px; height: 28px; }
.empty-state h2 { font-size: clamp(1.6rem, 2.6vw, 2.1rem); letter-spacing: -.02em; }
.empty-state p {
  margin: 14px auto 0;
  max-width: 34em;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--text-3);
}
.empty-state__cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 26px;
}
/* 公告列表 / 详情 */
.notice-list { display: grid; gap: 10px; max-width: 860px; margin: 0 auto; }
.notice-row {
  display: grid;
  grid-template-columns: 104px minmax(0, 1fr) 20px;
  gap: 18px;
  align-items: start;
  padding: 20px 22px;
  border-radius: var(--r-lg);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-2);
  transition: transform .25s var(--ease-decel), border-color .25s var(--ease-standard),
              box-shadow .25s var(--ease-standard);
}
.notice-row:hover { transform: translateY(-2px); border-color: var(--accent-ring); box-shadow: var(--shadow-4); }
.notice-row time {
  font-family: var(--font-num);
  font-size: .75rem;
  color: var(--text-4);
  letter-spacing: .04em;
  padding-top: 3px;
}
.notice-row b { font-size: 1rem; color: var(--text-1); font-weight: 620; display: block; }
.notice-row p { margin-top: 6px; font-size: .8125rem; color: var(--text-3); line-height: 1.7; }
.notice-row__go { color: var(--text-4); font-size: 1.125rem; line-height: 1; align-self: center; }

.notice-detail { max-width: 760px; margin: 0 auto; }
.notice-detail .crumb { display: inline-flex; gap: 6px; align-items: center; font-size: .8125rem; color: var(--text-3); margin-bottom: 22px; }
.notice-detail time {
  display: block;
  font-family: var(--font-num);
  font-size: .75rem;
  color: var(--text-4);
  letter-spacing: .06em;
  margin-bottom: 8px;
}
.notice-detail h1 { font-size: clamp(1.6rem, 2.8vw, 2.2rem); letter-spacing: -.02em; margin-bottom: 18px; }
.notice-detail__body p { font-size: 1rem; line-height: 1.95; color: var(--text-2); }
.notice-detail__body p + p { margin-top: 14px; }

@media (max-width: 640px) {
  .notice-row { grid-template-columns: 1fr 20px; gap: 8px 12px; }
  .notice-row time { grid-column: 1 / -1; }
}
/* 公告：封面 / 图片 / 视频 */
.notice-row { grid-template-columns: 104px minmax(0, 1fr) 20px; }
.notice-row__thumb {
  display: block;
  width: 104px;
  height: 68px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--layer-2);
  border: 1px solid var(--stroke);
}
.notice-row__thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.notice-row:has(.notice-row__thumb) { grid-template-columns: 104px 104px minmax(0, 1fr) 20px; }

.notice-cover {
  margin: 20px 0 26px;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--stroke);
  background: var(--layer-2);
}
.notice-cover img { display: block; width: 100%; height: auto; }

.notice-img { margin: 20px 0; }
.notice-img img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke);
  background: var(--layer-2);
}
.notice-video { margin: 20px 0; }
.notice-video video {
  display: block;
  width: 100%;
  max-height: 70vh;
  border-radius: var(--r-md);
  border: 1px solid var(--stroke);
  background: #0B1016;
}
.notice-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 26px;
}
.notice-gallery figure {
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--stroke);
  background: var(--layer-2);
}
.notice-gallery img { display: block; width: 100%; height: auto; }

@media (max-width: 640px) {
  .notice-row:has(.notice-row__thumb) { grid-template-columns: 72px minmax(0, 1fr) 20px; }
  .notice-row__thumb { width: 72px; height: 54px; }
}
/* 公告媒体：限高，避免长截图撑满整页 */
.notice-cover { aspect-ratio: 16 / 9; }
.notice-cover img { width: 100%; height: 100%; object-fit: cover; }
.notice-img img { max-height: 72vh; width: auto; max-width: 100%; margin: 0 auto; }
.notice-video video { max-height: 72vh; }
/* 轮播配图（首页入口三屏） */
.slide-shot {
  position: relative;
  margin: 0;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--stroke-strong);
  background: #fff;
  box-shadow: 0 16px 44px rgba(16, 32, 56, .14);
}
.slide-shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.slide-shot--wall img { object-position: 74% 20%; }
.slide-shot figcaption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  padding: 4px 11px;
  border-radius: var(--r-pill);
  background: rgba(255, 255, 255, .88);
  border: 1px solid var(--stroke);
  font-size: .6875rem;
  color: var(--text-2);
  letter-spacing: .02em;
  backdrop-filter: blur(6px);
}
@media (max-width: 900px) {
  .slide-shot img { aspect-ratio: 16 / 11; }
}

/* 锚点跳转时避开固定导航 */
.sw-detail,
article[id],
section[id] { scroll-margin-top: 96px; }
/* QQ 群卡片 / 购买区群号 */
.qq-card {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-top: 16px;
  padding: 22px 26px;
  border-radius: var(--r-xl);
  border: 1px solid var(--stroke);
  background: var(--layer-1);
  box-shadow: var(--shadow-3);
  flex-wrap: wrap;
}
.qq-card__mark {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  flex: none;
  border-radius: 16px;
  background: linear-gradient(160deg, #2C9CF5, #0B67C9);
  color: #fff;
}
.qq-card__mark svg { width: 26px; height: 26px; }
.qq-card__body { flex: 1; min-width: 240px; }
.qq-card__body h3 { font-size: 1.0625rem; letter-spacing: -.01em; }
.qq-card__body p { margin-top: 6px; font-size: .875rem; line-height: 1.7; color: var(--text-3); }

.buy-qq {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--divider);
  font-size: .8125rem;
  color: var(--text-3);
}
.buy-qq b { color: var(--text-1); font-family: var(--font-num); letter-spacing: .04em; }
.btn--sm { height: 30px; padding: 0 12px; font-size: .75rem; }

@media (max-width: 640px) {
  .qq-card { padding: 18px; gap: 14px; }
  .qq-card__mark { width: 44px; height: 44px; border-radius: 13px; }
}