/* ==========================================================================
   快喵 (KuaiMiao) — 深色科技风 Dark Tech
   手写原生 CSS，无任何框架 / CDN 依赖
   全站样式变量集中在 :root，禁止散写魔法值
   ========================================================================== */

/* ---------- 0. 变量 ---------- */
:root {
  /* 品牌色：主色取自 logo-src.png 实测 H161 S.86 V.88 */
  --pri: #12c2a0;
  --pri2: #00d2ff;
  --pri3: #7c4dff;
  --acc: #ffb300;

  /* 底色层次 */
  --bg: #0b1026;
  --bg2: #0f1533;
  --card: #161d40;
  --card2: #1b2350;

  /* 线条与文字 */
  --line: rgba(18, 194, 160, .22);
  --line2: rgba(255, 255, 255, .07);
  --txt: #eaefff;
  --muted: #9aa5cc;
  --wht: #fff;

  /* 渐变 */
  --grad: linear-gradient(120deg, #12c2a0, #00d2ff);
  --grad-soft: linear-gradient(120deg, rgba(18, 194, 160, .16), rgba(0, 210, 255, .12));

  /* 阴影与圆角 */
  --shadow: 0 18px 46px rgba(7, 10, 30, .45);
  --shadow-lg: 0 26px 66px rgba(7, 10, 30, .62);
  --glow: 0 0 0 1px rgba(18, 194, 160, .35), 0 14px 40px rgba(18, 194, 160, .22);
  --r: 18px;
  --r-sm: 12px;
  --r-xs: 8px;

  /* 布局 */
  --wrap: 1200px;
  --pad: 22px;
  --sec-y: 88px;

  /* 字体 */
  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", "Hiragino Sans GB", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  /* 动效 */
  --ease: cubic-bezier(.4, 0, .2, 1);
}

/* ---------- 1. 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(86px + var(--notice-h));
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--txt);
  background: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; font-size: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
ul, ol { margin: 0; padding: 0; }
h1, h2, h3, h4, h5 { margin: 0; line-height: 1.28; font-weight: 800; letter-spacing: -.01em; }
p { margin: 0; }
table { border-collapse: collapse; width: 100%; }

::selection { background: rgba(18, 194, 160, .32); color: #fff; }

:focus-visible {
  outline: 2px solid var(--pri);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 2. 通用布局 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

.sec { padding: var(--sec-y) 0; position: relative; }
.sec-alt { background: var(--bg2); }

.sec-head { text-align: center; max-width: 780px; margin: 0 auto 52px; }

.tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  padding: 6px 15px;
  border-radius: 100px;
  color: var(--pri);
  background: rgba(18, 194, 160, .1);
  border: 1px solid var(--line);
  margin-bottom: 18px;
}

.sec-head h2 {
  font-size: clamp(26px, 3.6vw, 42px);
  margin-bottom: 16px;
}

.sec-head p {
  color: var(--muted);
  font-size: 16.5px;
}

.grad-txt {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

.sec-head--left { text-align: left; margin-left: 0; }

/* ---------- 3. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  padding: 15px 29px;
  border-radius: 100px;
  transition: transform .22s var(--ease), box-shadow .22s var(--ease),
              background .22s var(--ease), border-color .22s var(--ease), color .22s var(--ease);
  white-space: nowrap;
  border: 1px solid transparent;
}

.btn-pri {
  background: var(--grad);
  color: #04121b;
  box-shadow: 0 10px 30px rgba(18, 194, 160, .3);
}
.btn-pri:hover { transform: translateY(-2px); box-shadow: 0 16px 42px rgba(18, 194, 160, .45); }

.btn-ghost {
  border-color: var(--line);
  color: var(--txt);
  background: rgba(255, 255, 255, .03);
}
.btn-ghost:hover {
  border-color: var(--pri);
  color: var(--pri);
  background: rgba(18, 194, 160, .08);
  transform: translateY(-2px);
}

.btn-lg { padding: 18px 38px; font-size: 16.5px; }
.btn-sm { padding: 11px 20px; font-size: 14px; }
.btn-block { width: 100%; }

/* ---------- 4. 顶部第三方身份声明条 ---------- */
.notice {
  position: relative;
  z-index: 60;
  background: linear-gradient(90deg, rgba(124, 77, 255, .18), rgba(18, 194, 160, .14));
  border-bottom: 1px solid var(--line2);
  font-size: 13px;
  color: var(--muted);
}

.notice-in {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px var(--pad);
  max-width: var(--wrap);
  margin: 0 auto;
}

/* 声明条 + 吸顶导航的总高度，供 hero / 锚点偏移复用。
   注意：声明条文案在窄屏会换行变高，39px 只是「未启用 JS」时的兜底值；
   启用 JS 后由 main.js 实测 .notice 高度写入 --notice-h（见 syncNotice）。 */
body {
  --notice-h: 0px;
}
body.has-notice { --notice-h: 39px; }
/* 窄屏声明条文案会换行变高，未启用 JS 时用更大兜底值避免导航被盖住 */
@media (max-width: 768px) {
  body.has-notice { --notice-h: 78px; }
}

.notice-ico { flex: 0 0 auto; font-size: 15px; line-height: 1; }

.notice-txt { flex: 1; line-height: 1.5; }
.notice-txt strong { color: var(--pri); font-weight: 700; }

.notice-x {
  flex: 0 0 auto;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 15px;
  transition: background .2s, color .2s;
}
.notice-x:hover { background: rgba(255, 255, 255, .08); color: var(--txt); }
.notice.hidden { display: none; }

/* ---------- 5. 导航 ---------- */
.hd {
  position: fixed;
  top: var(--notice-h);
  left: 0;
  right: 0;
  /* 必须低于声明条(60)：两者若重叠，应让声明条优先命中（关闭按钮可用）。
     main.js 会实测声明条高度写入 --notice-h，导航 top 精确等于声明条底边，
     因此正常状态下两者不会重叠；此处只作为「禁用 JS」时的兜底层级。 */
  z-index: 50;
  transition: background .3s var(--ease), border-color .3s var(--ease),
              backdrop-filter .3s;
  border-bottom: 1px solid transparent;
}
.hd.scrolled {
  background: rgba(11, 16, 38, .86);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom-color: var(--line2);
}

.hd-in {
  display: flex;
  align-items: center;
  gap: 26px;
  height: 74px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.logo { display: flex; align-items: center; gap: 11px; flex: 0 0 auto; }
.logo img { width: 36px; height: 36px; border-radius: 10px; }
.logo-txt { font-size: 20px; font-weight: 800; letter-spacing: .01em; }
.logo-sub {
  font-size: 10.5px;
  color: var(--muted);
  letter-spacing: .18em;
  text-transform: uppercase;
  margin-top: -5px;
  display: block;
}

.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }

.nav-item { position: relative; }

.nav-a {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 15px;
  border-radius: var(--r-xs);
  font-size: 15px;
  font-weight: 600;
  color: var(--txt);
  transition: color .2s, background .2s;
}
.nav-a::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4.5px solid currentColor;
  opacity: .55;
  transition: transform .22s var(--ease);
}
.nav-item:hover .nav-a, .nav-a:hover { color: var(--pri); background: rgba(18, 194, 160, .08); }
.nav-item:hover .nav-a::after { transform: rotate(180deg); }

.dd {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 196px;
  background: var(--card);
  border: 1px solid var(--line2);
  border-radius: var(--r-sm);
  padding: 8px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s;
}
.nav-item:hover .dd,
.nav-item.open .dd { opacity: 1; visibility: visible; transform: translateY(0); }

.dd a {
  display: block;
  padding: 9px 13px;
  border-radius: var(--r-xs);
  font-size: 14.2px;
  color: var(--muted);
  transition: background .18s, color .18s, padding-left .18s;
}
.dd a:hover { background: rgba(18, 194, 160, .1); color: var(--pri); padding-left: 17px; }

.hd-cta { flex: 0 0 auto; }

.burger {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--r-xs);
  border: 1px solid var(--line2);
  place-items: center;
  margin-left: auto;
}
.burger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--txt);
  border-radius: 2px;
  position: relative;
  transition: background .2s;
}
.burger span::before, .burger span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--txt);
  border-radius: 2px;
  transition: transform .28s var(--ease), top .28s var(--ease);
}
.burger span::before { top: -6px; }
.burger span::after { top: 6px; }
.burger.on span { background: transparent; }
.burger.on span::before { top: 0; transform: rotate(45deg); }
.burger.on span::after { top: 0; transform: rotate(-45deg); }

/* 移动抽屉 */
.drawer {
  position: fixed;
  inset: 0 0 0 auto;
  width: min(340px, 86vw);
  background: var(--bg2);
  border-left: 1px solid var(--line2);
  z-index: 70;
  transform: translateX(100%);
  transition: transform .32s var(--ease);
  overflow-y: auto;
  padding: 22px;
  padding-top: 76px;
  top: var(--notice-h);
  height: calc(100% - var(--notice-h));
}
.drawer.on { transform: translateX(0); }
.drawer-mask {
  position: fixed;
  inset: 0;
  background: rgba(3, 6, 18, .68);
  backdrop-filter: blur(3px);
  z-index: 65;
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s, visibility .3s;
}
.drawer-mask.on { opacity: 1; visibility: visible; }

.drawer h4 {
  font-size: 12.5px;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--pri);
  margin: 20px 0 8px;
}
.drawer a {
  display: block;
  padding: 11px 13px;
  border-radius: var(--r-xs);
  color: var(--muted);
  font-size: 15px;
  border-bottom: 1px solid var(--line2);
  transition: color .18s, background .18s;
}
.drawer a:hover { color: var(--pri); background: rgba(18, 194, 160, .08); }
.drawer .drawer-cta { margin-top: 22px; }
.drawer .drawer-cta a { border: 0; padding: 0; }

/* ---------- 6. Hero ---------- */
.hero {
  position: relative;
  padding: calc(168px + var(--notice-h)) 0 var(--sec-y);
  overflow: hidden;
  background: var(--bg);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(680px 420px at 12% 8%, rgba(18, 194, 160, .22), transparent 62%),
    radial-gradient(720px 460px at 88% 26%, rgba(0, 210, 255, .17), transparent 64%),
    radial-gradient(560px 380px at 60% 108%, rgba(124, 77, 255, .13), transparent 66%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .038) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .038) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: radial-gradient(ellipse 90% 62% at 50% 30%, #000 12%, transparent 76%);
  mask-image: radial-gradient(ellipse 90% 62% at 50% 30%, #000 12%, transparent 76%);
  pointer-events: none;
}

.hero-in {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.06fr .94fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  font-weight: 600;
  color: var(--pri);
  background: rgba(18, 194, 160, .1);
  border: 1px solid var(--line);
  padding: 8px 17px;
  border-radius: 100px;
  margin-bottom: 24px;
}
.hero-badge i {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--pri);
  box-shadow: 0 0 0 4px rgba(18, 194, 160, .2);
  animation: pulse 2.2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(18, 194, 160, .2); }
  50% { box-shadow: 0 0 0 8px rgba(18, 194, 160, .04); }
}

.hero h1 {
  font-size: clamp(32px, 4.9vw, 58px);
  line-height: 1.14;
  letter-spacing: -.026em;
  margin-bottom: 22px;
}

.hero-slogan {
  color: var(--muted);
  font-size: 17px;
  max-width: 545px;
  margin-bottom: 34px;
}

.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 46px; }

.stats { display: flex; gap: 0; flex-wrap: wrap; }
.stat {
  flex: 1 1 0;
  min-width: 116px;
  padding-right: 22px;
  position: relative;
}
.stat + .stat { padding-left: 22px; }
.stat + .stat::before {
  content: "";
  position: absolute;
  left: 0; top: 6px; bottom: 6px;
  width: 1px;
  background: var(--line2);
}
.stat b {
  display: block;
  font-size: clamp(24px, 2.7vw, 33px);
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.stat span { font-size: 13.2px; color: var(--muted); }

/* Hero 右侧：客户端 UI 模拟器 */
.app {
  background: linear-gradient(165deg, var(--card2), var(--card));
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
}
.app::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(320px 220px at 82% 0%, rgba(18, 194, 160, .16), transparent 68%);
  pointer-events: none;
}

.app-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line2);
  position: relative;
  z-index: 1;
}
.app-dots { display: flex; gap: 6px; }
.app-dots i { width: 10px; height: 10px; border-radius: 50%; background: rgba(255, 255, 255, .14); }
.app-dots i:first-child { background: rgba(255, 95, 86, .7); }
.app-dots i:nth-child(2) { background: rgba(255, 189, 46, .7); }
.app-dots i:nth-child(3) { background: rgba(39, 201, 63, .7); }
.app-title { font-size: 13px; font-weight: 700; margin-left: 4px; }
.app-sub { font-size: 11.5px; color: var(--muted); margin-left: auto; }

.app-body { padding: 20px; position: relative; z-index: 1; }

.gauge { text-align: center; padding: 6px 0 20px; }
.gauge-ring {
  width: 156px;
  height: 156px;
  margin: 0 auto 12px;
  position: relative;
}
.gauge-ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.gauge-track { fill: none; stroke: rgba(255, 255, 255, .08); stroke-width: 9; }
.gauge-val {
  fill: none;
  stroke: url(#gaugeGrad);
  stroke-width: 9;
  stroke-linecap: round;
  stroke-dasharray: 264;
  stroke-dashoffset: 264;
  transition: stroke-dashoffset 1.1s var(--ease);
}
.gauge-num {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
}
.gauge-num b {
  display: block;
  font-size: 40px;
  font-weight: 800;
  color: var(--pri);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}
.gauge-num span { font-size: 12px; color: var(--muted); }
.gauge-lbl { font-size: 13px; color: var(--muted); }

.app-nodes { display: grid; gap: 8px; margin-bottom: 16px; }
.node {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line2);
  background: rgba(255, 255, 255, .028);
  cursor: pointer;
  transition: border-color .2s, background .2s;
  text-align: left;
  width: 100%;
}
.node:hover { border-color: var(--line); background: rgba(18, 194, 160, .07); }
.node.on { border-color: var(--pri); background: rgba(18, 194, 160, .12); }
.node-name { font-size: 14px; font-weight: 600; }
.node-code { font-size: 11px; color: var(--muted); font-family: var(--mono); }
.node-d { margin-left: auto; font-size: 13.5px; font-weight: 700; color: var(--pri); font-variant-numeric: tabular-nums; }
.node-bar { width: 46px; height: 4px; border-radius: 4px; background: rgba(255, 255, 255, .1); overflow: hidden; }
.node-bar i { display: block; height: 100%; background: var(--grad); border-radius: 4px; }

.app-toggles { display: grid; gap: 4px; margin-bottom: 18px; }
.tg {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 2px;
  font-size: 13.8px;
  color: var(--muted);
}
.sw {
  margin-left: auto;
  width: 42px;
  height: 24px;
  border-radius: 100px;
  background: rgba(255, 255, 255, .12);
  position: relative;
  transition: background .25s var(--ease);
  flex: 0 0 auto;
}
.sw::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  transition: transform .25s var(--ease);
}
.sw.on { background: var(--grad); }
.sw.on::after { transform: translateX(18px); }

.app-btn {
  width: 100%;
  padding: 15px;
  border-radius: 100px;
  background: var(--grad);
  color: #04121b;
  font-weight: 800;
  font-size: 15.5px;
  letter-spacing: .02em;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
  box-shadow: 0 10px 28px rgba(18, 194, 160, .3);
}
.app-btn:hover { transform: translateY(-2px); box-shadow: 0 15px 38px rgba(18, 194, 160, .44); }
.app-btn.live { background: linear-gradient(120deg, #ff7a59, #ffb300); color: #2a1200; }

/* ---------- 7. 卡片网格通用 ---------- */
.grid { display: grid; gap: 20px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--card);
  border: 1px solid var(--line2);
  border-radius: var(--r);
  padding: 26px;
  position: relative;
  transition: transform .26s var(--ease), box-shadow .26s var(--ease), border-color .26s var(--ease);
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--line);
}

/* 核心功能卡 */
.feat { padding: 26px 24px 24px; overflow: hidden; }
.feat-no {
  position: absolute;
  top: 14px;
  right: 20px;
  font-size: 40px;
  font-weight: 800;
  font-family: var(--mono);
  color: rgba(255, 255, 255, .045);
  line-height: 1;
  letter-spacing: -.05em;
}
.feat-ico {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  font-size: 21px;
  background: var(--grad-soft);
  border: 1px solid var(--line);
  margin-bottom: 15px;
}
.feat h3 { font-size: 17.5px; margin-bottom: 9px; }
.feat p { font-size: 14.4px; color: var(--muted); line-height: 1.68; }

/* 优势列表 */
.adv { display: flex; gap: 16px; padding: 24px; }
.adv-ico {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 19px;
  background: var(--grad-soft);
  border: 1px solid var(--line);
}
.adv h3 { font-size: 16.8px; margin-bottom: 8px; }
.adv p { font-size: 14.2px; color: var(--muted); line-height: 1.68; }

/* 场景卡 */
.scene { text-align: center; padding: 30px 22px; }
.scene-ico {
  width: 56px;
  height: 56px;
  margin: 0 auto 15px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-size: 25px;
  background: var(--grad-soft);
  border: 1px solid var(--line);
}
.scene h3 { font-size: 17px; margin-bottom: 9px; }
.scene p { font-size: 14.2px; color: var(--muted); line-height: 1.68; }

/* ---------- 8. 步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; position: relative; }
.steps::before {
  content: "";
  position: absolute;
  top: 27px;
  left: 13%;
  right: 13%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), var(--line), transparent);
}
.step { text-align: center; position: relative; }
.step-no {
  width: 54px;
  height: 54px;
  margin: 0 auto 18px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 20px;
  font-weight: 800;
  color: #04121b;
  background: var(--grad);
  box-shadow: 0 0 0 7px var(--bg), 0 10px 26px rgba(18, 194, 160, .3);
  position: relative;
  z-index: 1;
  font-variant-numeric: tabular-nums;
}
.sec-alt .step-no { box-shadow: 0 0 0 7px var(--bg2), 0 10px 26px rgba(18, 194, 160, .3); }
.step h3 { font-size: 17px; margin-bottom: 9px; }
.step p { font-size: 14.2px; color: var(--muted); line-height: 1.68; }

/* ---------- 9. 节点卡 ---------- */
.nodecard { padding: 22px; }
.nodecard-top { display: flex; align-items: baseline; gap: 10px; margin-bottom: 16px; }
.nodecard-region { font-size: 17.5px; font-weight: 800; }
.nodecard-code { font-size: 12px; font-family: var(--mono); color: var(--muted); margin-left: auto; }
.nodecard-meta { display: flex; justify-content: space-between; font-size: 13.4px; margin-bottom: 7px; color: var(--muted); }
.nodecard-meta b { color: var(--pri); font-variant-numeric: tabular-nums; }
.bar { height: 6px; border-radius: 6px; background: rgba(255, 255, 255, .08); overflow: hidden; }
.bar i { display: block; height: 100%; border-radius: 6px; background: var(--grad); transition: width 1s var(--ease); }

/* ---------- 10. 速度数据大数字 ---------- */
.speed { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; text-align: center; }
.speed-it { padding: 34px 20px; border-radius: var(--r); background: var(--card); border: 1px solid var(--line2); }
.speed-it b {
  display: block;
  font-size: clamp(38px, 5.2vw, 62px);
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  line-height: 1.06;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.03em;
}
.speed-it strong { display: block; font-size: 16px; margin: 12px 0 7px; }
.speed-it span { font-size: 13.4px; color: var(--muted); }

/* ---------- 11. 协议卡 ---------- */
.proto { text-align: center; padding: 30px 24px; }
.proto-abbr {
  display: inline-grid;
  place-items: center;
  min-width: 66px;
  height: 44px;
  padding: 0 14px;
  border-radius: 11px;
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 800;
  letter-spacing: .06em;
  color: var(--pri);
  background: rgba(18, 194, 160, .1);
  border: 1px solid var(--line);
  margin-bottom: 16px;
}
.proto h3 { font-size: 16.6px; margin-bottom: 9px; }
.proto p { font-size: 14.2px; color: var(--muted); line-height: 1.68; }

/* ---------- 12. 下载平台卡 ---------- */
.plat { padding: 28px; display: flex; flex-direction: column; }
.plat-top { display: flex; align-items: center; gap: 14px; margin-bottom: 18px; }
.plat-ico {
  width: 52px;
  height: 52px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  font-size: 25px;
  background: var(--grad-soft);
  border: 1px solid var(--line);
  flex: 0 0 52px;
}
.plat h3 { font-size: 19px; }
.plat-req { font-size: 12.6px; color: var(--muted); }
.plat-rows { display: grid; gap: 8px; margin-bottom: 20px; }
.plat-row { display: flex; justify-content: space-between; font-size: 13.6px; padding-bottom: 8px; border-bottom: 1px solid var(--line2); }
.plat-row span { color: var(--muted); }
.plat-row b { font-family: var(--mono); font-weight: 600; font-size: 13px; }
.plat .btn { margin-top: auto; }
.plat-sha {
  font-family: var(--mono);
  font-size: 10.6px;
  color: var(--muted);
  word-break: break-all;
  line-height: 1.5;
  background: rgba(255, 255, 255, .03);
  border: 1px solid var(--line2);
  border-radius: var(--r-xs);
  padding: 9px 11px;
  margin-bottom: 18px;
  opacity: .82;
}

/* ---------- 13. 价格套餐 ---------- */
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: start; }
.plan { padding: 32px 28px; display: flex; flex-direction: column; }
.plan.fea {
  border-color: var(--pri);
  box-shadow: var(--glow);
  transform: scale(1.03);
  z-index: 2;
}
.plan.fea:hover { transform: scale(1.03) translateY(-2px); }
.plan-badge {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--grad);
  color: #04121b;
  font-size: 12px;
  font-weight: 800;
  padding: 6px 16px;
  border-radius: 100px;
  white-space: nowrap;
  letter-spacing: .03em;
}
.plan h3 { font-size: 19px; margin-bottom: 7px; }
.plan-desc { font-size: 13.6px; color: var(--muted); margin-bottom: 22px; }
.plan-price { display: flex; align-items: baseline; gap: 3px; margin-bottom: 24px; }
.plan-price b {
  font-size: 42px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  letter-spacing: -.03em;
  line-height: 1;
}
.plan-price span { font-size: 14px; color: var(--muted); }
.plan ul { list-style: none; display: grid; gap: 11px; margin-bottom: 26px; }
.plan li { display: flex; gap: 10px; font-size: 14.3px; color: var(--muted); line-height: 1.6; }
.plan li::before {
  content: "";
  flex: 0 0 auto;
  width: 17px;
  height: 17px;
  margin-top: 4px;
  border-radius: 50%;
  background: rgba(18, 194, 160, .16);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3.5 8.4l3 3 6-6.3' stroke='%2312c2a0' stroke-width='2' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: 12px;
  background-position: center;
  background-repeat: no-repeat;
}
.plan .btn { margin-top: auto; }

/* ---------- 14. SEO 收录文字模块 ---------- */
.seo-mod { max-width: 900px; margin: 0 auto; }
.seo-mod p { color: var(--muted); font-size: 15.6px; margin-bottom: 20px; line-height: 1.86; }
.seo-mod p:last-child { margin-bottom: 0; }
.seo-mod strong { color: var(--txt); font-weight: 700; }

/* ---------- 15. FAQ ---------- */
.faq-wrap { max-width: 860px; margin: 0 auto; display: grid; gap: 12px; }
.faq-it { background: var(--card); border: 1px solid var(--line2); border-radius: var(--r-sm); overflow: hidden; transition: border-color .24s; }
.faq-it.on { border-color: var(--line); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  text-align: left;
  padding: 19px 22px;
  font-size: 16px;
  font-weight: 700;
  transition: color .2s;
}
.faq-q:hover { color: var(--pri); }
.faq-it.on .faq-q { color: var(--pri); }
.faq-ico {
  margin-left: auto;
  flex: 0 0 auto;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  position: relative;
  transition: background .24s, transform .24s var(--ease);
}
.faq-ico::before, .faq-ico::after {
  content: "";
  position: absolute;
  background: var(--pri);
  border-radius: 2px;
  transition: transform .26s var(--ease), opacity .26s;
}
.faq-ico::before { width: 10px; height: 1.6px; }
.faq-ico::after { width: 1.6px; height: 10px; }
.faq-it.on .faq-ico { background: rgba(18, 194, 160, .14); transform: rotate(180deg); }
.faq-it.on .faq-ico::after { transform: scaleY(0); opacity: 0; }

.faq-a { max-height: 0; overflow: hidden; transition: max-height .34s var(--ease); }
.faq-a-in { padding: 0 22px 22px; }
.faq-a ol { padding-left: 20px; display: grid; gap: 10px; }
.faq-a li { font-size: 14.6px; color: var(--muted); line-height: 1.76; }
.faq-a li::marker { color: var(--pri); font-weight: 700; }

/* ---------- 16. 用户评价 ---------- */
.rev { padding: 26px; display: flex; flex-direction: column; }
.stars { color: var(--acc); font-size: 14px; letter-spacing: 2px; margin-bottom: 13px; }
.rev-q { font-size: 14.7px; color: var(--txt); line-height: 1.76; margin-bottom: 20px; flex: 1; }
.rev-who { display: flex; align-items: center; gap: 12px; margin-top: auto; }
.av {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 16px;
  font-weight: 800;
  color: #04121b;
  background: var(--grad);
}
.rev-name { font-size: 14.6px; font-weight: 700; }
.rev-role { font-size: 12.4px; color: var(--muted); }

/* ---------- 17. CTA 横幅 ---------- */
.cta {
  position: relative;
  border-radius: 24px;
  padding: 62px 44px;
  text-align: center;
  overflow: hidden;
  background: linear-gradient(150deg, var(--card2), var(--card));
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(460px 300px at 18% 12%, rgba(18, 194, 160, .26), transparent 62%),
    radial-gradient(460px 300px at 84% 88%, rgba(0, 210, 255, .2), transparent 62%);
  pointer-events: none;
}
.cta-in { position: relative; z-index: 1; }
.cta h2 { font-size: clamp(25px, 3.4vw, 38px); margin-bottom: 16px; }
.cta p { color: var(--muted); font-size: 16.4px; max-width: 620px; margin: 0 auto 32px; }
.cta-btns { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- 18. 博客列表 ---------- */
.posts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.post {
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
}
.post-thumb {
  height: 148px;
  position: relative;
  background: linear-gradient(140deg, rgba(18, 194, 160, .3), rgba(0, 210, 255, .18), rgba(124, 77, 255, .18));
  overflow: hidden;
  display: grid;
  place-items: center;
}
.post-thumb::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
  background-size: 26px 26px;
}
.post-thumb-i { font-size: 40px; position: relative; z-index: 1; filter: drop-shadow(0 4px 12px rgba(0, 0, 0, .3)); }
.post-cat {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  font-size: 11.5px;
  font-weight: 700;
  padding: 4px 11px;
  border-radius: 100px;
  background: rgba(11, 16, 38, .72);
  border: 1px solid var(--line);
  color: var(--pri);
  backdrop-filter: blur(6px);
}
.post-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.post-body h3 { font-size: 16.6px; margin-bottom: 10px; line-height: 1.45; }
.post-body h3 a { transition: color .2s; }
.post:hover .post-body h3 a { color: var(--pri); }
.post-ex { font-size: 13.9px; color: var(--muted); line-height: 1.68; margin-bottom: 16px; flex: 1; }
.post-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 12.4px;
  color: var(--muted);
  padding-top: 14px;
  border-top: 1px solid var(--line2);
}
.post-meta time { margin-right: auto; }

/* ---------- 19. 文章正文页 ---------- */
.crumb {
  font-size: 13.4px;
  color: var(--muted);
  padding: calc(108px + var(--notice-h)) 0 0;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}
.crumb a { color: var(--muted); transition: color .2s; }
.crumb a:hover { color: var(--pri); }
.crumb i { opacity: .5; font-style: normal; }
.crumb span { color: var(--txt); }

.art { max-width: 820px; margin: 0 auto; }
.art-hd { padding: 26px 0 30px; border-bottom: 1px solid var(--line2); margin-bottom: 34px; }
.art-cat {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 13px;
  border-radius: 100px;
  background: rgba(18, 194, 160, .1);
  border: 1px solid var(--line);
  color: var(--pri);
  margin-bottom: 16px;
}
.art-hd h1 { font-size: clamp(24px, 3.3vw, 35px); margin-bottom: 16px; line-height: 1.32; }
.art-meta { display: flex; gap: 18px; flex-wrap: wrap; font-size: 13.4px; color: var(--muted); }

.art-body h2 {
  font-size: 21px;
  margin: 38px 0 15px;
  padding-left: 15px;
  position: relative;
}
.art-body h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: .2em;
  bottom: .2em;
  width: 3.5px;
  border-radius: 3px;
  background: var(--grad);
}
.art-body h2:first-child { margin-top: 0; }
.art-body p { color: var(--muted); font-size: 15.7px; line-height: 1.9; margin-bottom: 17px; }

.art-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 46px;
  padding-top: 28px;
  border-top: 1px solid var(--line2);
  flex-wrap: wrap;
}
.art-nav a {
  font-size: 14.4px;
  color: var(--muted);
  padding: 11px 18px;
  border: 1px solid var(--line2);
  border-radius: 100px;
  transition: color .2s, border-color .2s, transform .2s;
}
.art-nav a:hover { color: var(--pri); border-color: var(--pri); transform: translateY(-2px); }
.art-nav .sp { margin-left: auto; }

/* ---------- 20. 关键词大全页 ---------- */
.kw-group { margin-bottom: 46px; }
.kw-group > h2 { font-size: 22px; margin-bottom: 8px; }
.kw-group > p { font-size: 14.4px; color: var(--muted); margin-bottom: 22px; }
.kw-list { display: flex; flex-wrap: wrap; gap: 10px; }
.kw {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 100px;
  background: var(--card);
  border: 1px solid var(--line2);
  font-size: 14.2px;
  transition: border-color .2s, background .2s, transform .2s, color .2s;
}
.kw:hover { border-color: var(--pri); background: rgba(18, 194, 160, .09); color: var(--pri); transform: translateY(-2px); }
.kw-star { color: var(--acc); font-size: 11.5px; letter-spacing: 1px; }
.kw-tab { font-size: 11.4px; color: var(--muted); font-family: var(--mono); }

/* ---------- 21. 站点地图页 ---------- */
.map-col { padding: 24px; }
.map-col h3 { font-size: 16.6px; margin-bottom: 14px; padding-bottom: 12px; border-bottom: 1px solid var(--line2); color: var(--pri); }
.map-col ul { list-style: none; display: grid; gap: 9px; max-height: 460px; overflow-y: auto; padding-right: 6px; }
.map-col a { font-size: 13.9px; color: var(--muted); transition: color .18s, padding-left .18s; display: block; }
.map-col a:hover { color: var(--pri); padding-left: 5px; }
.map-col ul::-webkit-scrollbar { width: 5px; }
.map-col ul::-webkit-scrollbar-thumb { background: var(--line); border-radius: 5px; }

/* ---------- 22. 免责/法务页 ---------- */
.legal { max-width: 820px; margin: 0 auto; }
.legal h2 { font-size: 20px; margin: 34px 0 14px; color: var(--pri); }
.legal h2:first-child { margin-top: 0; }
.legal p { color: var(--muted); font-size: 15.4px; line-height: 1.86; margin-bottom: 15px; }
.legal ul { padding-left: 22px; margin-bottom: 17px; display: grid; gap: 9px; }
.legal li { color: var(--muted); font-size: 15px; line-height: 1.8; }
.legal li::marker { color: var(--pri); }
.legal dl { display: grid; gap: 12px; }
.legal dt { font-weight: 700; font-size: 15px; }
.legal dd { margin: 0; color: var(--muted); font-size: 15px; }

/* ---------- 23. 页脚 ---------- */
.ft {
  background: var(--bg2);
  border-top: 1px solid var(--line2);
  padding: 62px 0 0;
  margin-top: 0;
}
.ft-top { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr; gap: 34px; padding-bottom: 46px; }
.ft-brand .logo { margin-bottom: 16px; }
.ft-desc { font-size: 14px; color: var(--muted); line-height: 1.78; margin-bottom: 16px; max-width: 320px; }
.ft-mail { font-size: 13.6px; color: var(--muted); }
.ft-mail a { color: var(--pri); }
.ft-col h4 { font-size: 14.4px; margin-bottom: 16px; }
.ft-col ul { list-style: none; display: grid; gap: 10px; }
.ft-col a { font-size: 13.7px; color: var(--muted); transition: color .18s, padding-left .18s; display: block; }
.ft-col a:hover { color: var(--pri); padding-left: 5px; }

.ft-disc {
  border-top: 1px solid var(--line2);
  padding: 26px 0;
  font-size: 12.8px;
  color: var(--muted);
  line-height: 1.8;
}
.ft-disc strong { color: var(--txt); }
.ft-disc a { color: var(--pri); }

.ft-bot {
  border-top: 1px solid var(--line2);
  padding: 20px 0 28px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--muted);
}
.ft-bot a { color: var(--muted); }
.ft-bot a:hover { color: var(--pri); }
.ft-bot-in { display: flex; gap: 20px; flex-wrap: wrap; }

/* ---------- 24. 进场动画 ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 25. 面包屑上方通用页头 ---------- */
.pg-top { padding: calc(132px + var(--notice-h)) 0 46px; position: relative; }
.pg-top h1 { font-size: clamp(27px, 3.9vw, 44px); margin-bottom: 15px; }
.pg-top > .wrap > p { color: var(--muted); font-size: 16.4px; max-width: 700px; }

/* 下载页锚点 */
.anchor { scroll-margin-top: calc(96px + var(--notice-h)); }

/* ---------- 26. 响应式：992 / 768 / 480 ---------- */
@media (max-width: 992px) {
  :root { --sec-y: 66px; }

  .hero { padding-top: calc(142px + var(--notice-h)); }
  .hero-in { grid-template-columns: 1fr; gap: 44px; }
  .hero-slogan { max-width: none; }
  .app { max-width: 480px; margin: 0 auto; width: 100%; }

  .g4 { grid-template-columns: repeat(2, 1fr); }
  .g3 { grid-template-columns: repeat(2, 1fr); }

  .steps { grid-template-columns: repeat(2, 1fr); gap: 34px 22px; }
  .steps::before { display: none; }

  .speed { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .speed-it { padding: 26px 14px; }

  .plans { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .plan.fea { transform: none; }
  .plan.fea:hover { transform: translateY(-2px); }

  .posts { grid-template-columns: repeat(2, 1fr); }

  .ft-top { grid-template-columns: repeat(3, 1fr); gap: 30px; }
  .ft-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  :root { --sec-y: 54px; --r: 16px; }

  body { font-size: 15.5px; }

  .nav, .hd-cta { display: none; }
  .burger { display: grid; }
  .hd-in { height: 66px; gap: 14px; }

  .hero { padding-top: calc(122px + var(--notice-h)); }
  .hero h1 { font-size: clamp(28px, 7.6vw, 38px); }
  .hero-btns { margin-bottom: 36px; }
  .hero-btns .btn { flex: 1 1 auto; justify-content: center; }

  .stats { gap: 18px 0; }
  .stat { flex: 1 1 44%; min-width: 0; padding: 0 14px 0 0; }
  .stat + .stat { padding-left: 14px; }
  .stat:nth-child(odd)::before { display: none; }
  .stat:nth-child(3)::before { display: none; }

  .g2, .g3, .g4 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 30px; }

  .sec-head { margin-bottom: 38px; }

  .speed { grid-template-columns: 1fr; gap: 14px; }
  .speed-it { padding: 26px 20px; }

  .posts { grid-template-columns: 1fr; }

  .cta { padding: 44px 24px; border-radius: 18px; }
  .cta-btns .btn { flex: 1 1 auto; }

  .pg-top { padding: calc(108px + var(--notice-h)) 0 34px; }

  .crumb { padding-top: calc(92px + var(--notice-h)); }

  .ft-top { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .ft-bot { flex-direction: column; gap: 10px; }

  .card { padding: 22px; }
  .feat-no { font-size: 32px; top: 12px; right: 16px; }
}

@media (max-width: 480px) {
  :root { --pad: 16px; --sec-y: 46px; }

  .logo-txt { font-size: 18px; }
  .logo img { width: 32px; height: 32px; }

  .hero { padding-top: calc(112px + var(--notice-h)); }
  .hero-badge { font-size: 12px; padding: 7px 13px; }
  .hero-btns { flex-direction: column; }
  .hero-btns .btn { width: 100%; }

  .stat b { font-size: 23px; }
  .stat span { font-size: 12.2px; }

  .app-body { padding: 16px; }
  .gauge-ring { width: 132px; height: 132px; }
  .gauge-num b { font-size: 33px; }

  .gauge { padding-bottom: 14px; }

  .faq-q { padding: 16px 17px; font-size: 15px; gap: 10px; }
  .faq-a-in { padding: 0 17px 18px; }
  .faq-a li { font-size: 14px; }

  .cta { padding: 36px 18px; }
  .art-nav { flex-direction: column; }
  .art-nav .sp { margin-left: 0; }

  .drawer { width: 88vw; padding: 18px; padding-top: 68px; }

  /* 窄屏压缩声明条：字号/行高收紧，避免占掉过多首屏高度 */
  .notice { font-size: 11.5px; }
  .notice-in { gap: 8px; padding: 7px var(--pad); }
  .notice-txt { line-height: 1.45; }
  .notice-x { width: 22px; height: 22px; font-size: 13px; }
}

/* ---------- 27. 减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}