/* =================================================================
   KLS 中控生态 · 统一视觉设计系统
   作用域：KLSDesigner / KLSEchoPlayer / KLSMediaPlayer 宣传手册
   设计方向：Precision Control — 深蓝品牌基调 + 冷调中性层次 + 染色阴影
   说明：本文件承载字体、设计令牌与全部共享组件；页面专属样式由各 HTML 内联 <style> 接管。
   ================================================================= */

/* ── 字体（国内 CDN：fonts.loli.net · Google Fonts 中国镜像 · woff2 子集化加载）── */
/* Noto Sans SC — 中文正文/UI，4 个字重，woff2 子集约 200KB/字重（vs 原 TTF ~10MB） */
@import url('https://fonts.loli.net/css2?family=Noto+Sans+SC:wght@400;500;700;900&display=swap');
/* Inter — 英文显示/品牌字（BMW M 规范），woff2 子集约 50KB/字重 */
@import url('https://fonts.loli.net/css2?family=Inter:wght@400;600;700;800&display=swap');

/* ── 设计令牌 ── */
:root {
  /* 品牌色阶（克制、单主色，饱和度受控） */
  --brand-900: #050e22;
  --brand-800: #06122a;   /* 深底 */
  --brand-700: #0a2a63;
  --brand-600: #0b57d0;   /* 主品牌 */
  --brand-500: #1f7fe8;   /* 次级品牌 */
  --brand-400: #5bb8fb;   /* 浅品牌/强调 */
  --brand-300: #9fd4fb;

  /* 墨色阶（冷调 slate，避免暖灰漂移） */
  --ink-900: #0a0f1a;
  --ink-800: #0d1626;     /* 正文 */
  --ink-600: #39435c;     /* 次级 */
  --ink-400: #6b768e;     /* 辅助 */
  --ink-300: #8a93a6;

  /* 表面 */
  --paper: #eef3fb;
  --paper-2: #e6edf8;
  --surface-tint: rgba(11,87,208,0.04);
  --white: #ffffff;

  /* 描边 */
  --line: rgba(11,87,208,0.16);
  --line-soft: rgba(11,87,208,0.08);

  /* 间距标度（4 的倍数，统一呼吸感） */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px; --sp-5: 24px;
  --sp-6: 32px; --sp-7: 48px; --sp-8: 64px; --sp-9: 96px;

  /* 圆角 */
  --radius: 18px;
  --radius-lg: 24px;
  --radius-sm: 12px;
  --radius-pill: 999px;

  /* 染色阴影（向品牌色偏移，避免灰脏阴影与霓虹外发光） */
  --shadow-sm: 0 1px 2px rgba(8,20,45,0.04), 0 8px 22px rgba(11,87,208,0.07);
  --shadow-md: 0 14px 40px rgba(8,20,45,0.10);
  --shadow-lg: 0 28px 70px rgba(8,20,45,0.14);

  /* 字体栈 */
  --font-display: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  /* 动效曲线 */
  --ease: cubic-bezier(.22,.61,.36,1);
  --ease-out: cubic-bezier(.16,1,.3,1);

  /* 容器 */
  --maxw: 1180px;
}

/* ── Reset ── */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--ink-800);
  background: var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── 布局基元 ── */
.wrap { width: min(var(--maxw), calc(100% - 48px)); margin: 0 auto; }
.display { font-family: var(--font-display); font-weight: 800; letter-spacing: -0.02em; line-height: 1.1; }

/* ── 区块统一标题 ── */
.kicker {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-display); font-size: 11px; font-weight: 700;
  letter-spacing: 0.22em; text-transform: uppercase; color: var(--brand-600); margin-bottom: 14px;
}
.kicker::before {
  content: ""; width: 24px; height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--brand-600), var(--brand-400));
}
.sec-head h2 {
  font-family: var(--font-display); font-size: clamp(27px, 3.6vw, 42px);
  font-weight: 800; letter-spacing: -0.02em; line-height: 1.12; margin-bottom: 12px;
}
.sec-head h2 em { font-style: normal; color: var(--brand-600); }
.sec-lead { max-width: 42em; color: var(--ink-400); font-size: 15px; line-height: 1.7; margin-bottom: var(--sp-7); }

/* ── 品牌标 ── */
.brand-mark { display: flex; align-items: center; gap: 12px; }
.brand-mark img { width: 38px; height: 38px; border-radius: 10px; box-shadow: var(--shadow-sm); }
.brand-mark .brand-logo {
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--brand-600), var(--brand-400));
  color: #fff; font-family: var(--font-display); font-weight: 800; font-size: 13px; letter-spacing: .04em;
  box-shadow: 0 6px 16px rgba(11,87,208,0.32);
}
/* 品牌名/副标题按 DESIGN.md(BMW M) 规范：Inter 作 BMW Type Next Latin 的开源替代，
   大写 + 1.5px 机械感字距 + 700 重显示；副标题同族 400 轻字重，形成重显示/轻正文的编辑张力 */
.brand-mark .name {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-weight: 700; font-size: 15px; letter-spacing: 1.5px; text-transform: uppercase;
}
.brand-mark .sub {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-weight: 400; font-size: 11px; color: var(--ink-400); letter-spacing: .5px;
}

/* ── 顶栏 ── */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100; padding: 14px 26px;
  display: flex; justify-content: space-between; align-items: center;
  transition: background .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  border-bottom: 1px solid transparent;
}
.topbar.scrolled {
  background: rgba(255,255,255,0.82); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line-soft); border-bottom: 1px solid var(--line-soft);
}
.topbar .topbar-right { display: flex; gap: 10px; align-items: center; }
.pill {
  display: inline-flex; align-items: center; gap: 6px; padding: 10px 17px; border-radius: var(--radius-pill);
  font-size: 12.5px; font-weight: 700; letter-spacing: .03em; border: 1px solid transparent; cursor: pointer;
  transition: transform .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease); font-family: inherit;
}
.pill:hover { transform: translateY(-1px); }
.pill-primary { background: var(--brand-600); color: #fff; }
.pill-primary:hover { background: var(--brand-500); }
.pill-ghost { background: transparent; color: var(--ink-800); border-color: var(--line); }
.pill-ghost:hover { background: #fff; }
.topbar.hero-top .pill-ghost { color: #fff; border-color: rgba(255,255,255,.32); }
.topbar.hero-top .pill-ghost:hover { background: rgba(255,255,255,.12); }
.topbar.hero-top .pill-primary { box-shadow: 0 8px 24px rgba(11,87,208,.4); }
/* Hero 顶栏在未滚动时叠加一层顶部深色渐变遮罩（scrim）：
   无论 Hero 背景图偏亮还是偏暗，品牌字都落在统一压暗的条带上，保证清晰可读。
   滚动后顶栏切换为浅色毛玻璃（.scrolled），遮罩与白色文字自动撤除，文字回深。 */
.topbar.hero-top:not(.scrolled)::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: linear-gradient(180deg, rgba(6,14,30,.68) 0%, rgba(6,14,30,.34) 54%, rgba(6,14,30,0) 100%);
}
.topbar.hero-top:not(.scrolled) .brand-mark .name { color: #fff; }
.topbar.hero-top:not(.scrolled) .brand-mark .sub { color: rgba(255,255,255,.72); }

/* ── Hero（非对称：左下文案 + 右气氛，避免居中 AI 感）── */
.hero {
  position: relative; min-height: 100vh; min-height: 100dvh; display: flex; align-items: flex-end;
  overflow: hidden; color: #fff; isolation: isolate;
}
.hero__bg { position: absolute; inset: 0; z-index: -3; background-size: cover; background-position: center; }
.hero__veil {
  position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(120% 90% at 78% 8%, rgba(11,87,208,.30), transparent 55%),
    linear-gradient(180deg, rgba(6,18,42,.30) 0%, rgba(6,18,42,.55) 52%, rgba(6,18,42,.94) 100%);
}
.hero__inner { width: min(var(--maxw), calc(100% - 48px)); margin: 0 auto; padding: 130px 0 54px; }
.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-display); font-size: 12px; font-weight: 700; letter-spacing: .18em;
  text-transform: uppercase; color: var(--brand-400); margin-bottom: 22px;
  opacity: 0; animation: rise .8s var(--ease) forwards .1s;
}
.hero__eyebrow::before { content: ""; width: 26px; height: 2px; border-radius: 2px; background: var(--brand-400); }
.hero__title {
  font-family: var(--font-display); font-size: clamp(40px, 6.4vw, 76px);
  font-weight: 800; letter-spacing: -0.03em; line-height: 1.04; margin-bottom: 22px; max-width: 17ch;
  opacity: 0; animation: rise .85s var(--ease) forwards .24s;
}
.hero__title em {
  font-style: normal; background: linear-gradient(100deg, #8fd0ff, #5bb8fb 60%, #2f8ff0);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__lead {
  font-size: clamp(15px, 1.9vw, 18px); max-width: 42em; color: rgba(255,255,255,.88); line-height: 1.62;
  margin-bottom: 30px; opacity: 0; animation: rise .8s var(--ease) forwards .42s;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; opacity: 0; animation: rise .8s var(--ease) forwards .58s; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 14px 24px; border-radius: var(--radius-pill);
  font-weight: 700; font-size: 13.5px; letter-spacing: .02em; border: 1px solid transparent; cursor: pointer;
  transition: transform .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease); font-family: inherit;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--brand-400); color: var(--brand-800); }
.btn-primary:hover { background: #fff; }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.34); }
.btn-outline:hover { border-color: rgba(255,255,255,.7); background: rgba(255,255,255,.08); }
.hero__version { font-size: 11px; color: rgba(255,255,255,.7); letter-spacing: .06em; margin-left: 4px; }

/* Hero 规格条（顶部细线 + 分隔，单色克制） */
.hero__strip {
  margin-top: 46px; display: flex; flex-wrap: wrap; gap: 0;
  border-top: 1px solid rgba(255,255,255,.18); padding-top: 22px;
  opacity: 0; animation: rise .8s var(--ease) forwards .74s;
}
.hero__strip .spec { padding: 0 30px; border-left: 1px solid rgba(255,255,255,.16); }
.hero__strip .spec:first-child { padding-left: 0; border-left: none; }
.hero__strip .spec b { display: block; font-family: var(--font-display); font-size: 16px; font-weight: 800; letter-spacing: .01em; }
.hero__strip .spec span { font-size: 12px; color: rgba(255,255,255,.66); letter-spacing: .02em; }

/* ── 区块通用 ── */
section { padding: var(--sp-9) 0; }
.section--dark { background: var(--brand-800); color: #fff; position: relative; overflow: hidden; }
.section--dark::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(120% 100% at 80% 0%, #000 30%, transparent 75%);
  mask-image: radial-gradient(120% 100% at 80% 0%, #000 30%, transparent 75%);
}
.section--dark .kicker { color: var(--brand-400); }
.section--dark .sec-lead { color: rgba(255,255,255,.66); }

/* ── 分栏（Why / About）── */
.split { background: var(--white); }
.split-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 52px; align-items: center; }
.split-copy p + p { margin-top: 13px; color: var(--ink-400); font-size: 14.5px; line-height: 1.7; }
.split-copy p:first-of-type { font-size: 15px; line-height: 1.7; color: var(--ink-600); }

/* Why KLS 编号要点（左侧细线 + 序号强调，非纯卡片堆叠） */
.points { display: grid; gap: 0; margin-top: 8px; }
.point { display: grid; grid-template-columns: 52px 1fr; gap: 14px; align-items: start; padding: 20px 0; border-bottom: 1px solid var(--line); }
.point:last-child { border-bottom: none; }
.point__no {
  font-family: var(--font-display); font-size: 17px; font-weight: 800; color: var(--brand-600);
  padding-top: 2px; position: relative;
}
.point__no::before {
  content: ""; position: absolute; left: -2px; top: 6px; bottom: 6px; width: 2px; border-radius: 2px;
  background: linear-gradient(180deg, var(--brand-600), var(--brand-400)); opacity: .5;
}
.point h3 { font-size: 17px; font-weight: 700; margin-bottom: 5px; letter-spacing: -.01em; }
.point p { color: var(--ink-400); font-size: 13.5px; line-height: 1.6; }

/* 分栏视觉（渐变面 + 漂浮产品图） */
.split-visual {
  position: relative; border-radius: var(--radius); overflow: hidden;
  background: linear-gradient(160deg, #0a1f44, #0b57d0 130%);
  min-height: 420px; display: grid; place-items: center; padding: 20px; box-shadow: var(--shadow-md);
}
.split-visual::after {
  content: ""; position: absolute; width: 280px; height: 280px; border-radius: 50%;
  right: -90px; top: -90px; background: radial-gradient(circle, rgba(91,184,251,.5), transparent 65%);
}
.split-visual img {
  width: min(520px, 92%); filter: drop-shadow(0 30px 50px rgba(0,0,0,.45));
  position: relative; z-index: 1; animation: floatY 6s ease-in-out infinite;
}

/* ── 核心能力卡片（两列网格，非三等分）── */
.features { background: var(--paper); }
.card-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.card {
  background: var(--white); border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: 26px 24px; display: flex; flex-direction: column; gap: 12px; position: relative; overflow: hidden;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.card::before {
  content: ""; position: absolute; left: 0; top: 0; height: 3px; width: 100%;
  background: linear-gradient(90deg, var(--brand-600), var(--brand-400));
  transform: scaleX(0); transform-origin: left; transition: transform .3s var(--ease);
  border-radius: var(--radius) var(--radius) 0 0;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--line); }
.card:hover::before { transform: scaleX(1); }
.card__top { display: flex; align-items: center; justify-content: space-between; }
.card__ico {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, rgba(11,87,208,.12), rgba(91,184,251,.14));
  color: var(--brand-600); display: grid; place-items: center;
}
.card__ico svg { width: 23px; height: 23px; }
.card__no { font-family: var(--font-display); font-weight: 800; font-size: 13px; color: var(--ink-400); letter-spacing: .08em; }
.card h3 { font-size: 17px; font-weight: 700; letter-spacing: -.01em; }
.card p { font-size: 13.5px; color: var(--ink-400); line-height: 1.6; }

/* ── 产品矩阵 / 技术架构（步骤流：连接箭头，规避三等分装饰卡）── */
.flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; position: relative; z-index: 1; }
.flow.is-steps .flow-card { position: relative; }
.flow.is-steps .flow-card:not(:last-child)::after {
  content: "→"; position: absolute; right: -13px; top: 50%; transform: translateY(-50%);
  font-family: var(--font-display); font-size: 18px; font-weight: 700; color: var(--brand-400); z-index: 3;
}
.flow-card {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius);
  padding: 26px 24px; backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}
.flow-card:hover { transform: translateY(-4px); border-color: rgba(91,184,251,.5); }
.flow-card img { width: 46px; height: 46px; border-radius: 11px; margin-bottom: 18px; box-shadow: 0 8px 22px rgba(0,0,0,.3); }
.flow-card .step { font-family: var(--font-display); font-size: 10px; font-weight: 700; letter-spacing: .18em; color: var(--brand-400); margin-bottom: 8px; }
.flow-card h3 { font-size: 19px; font-weight: 700; margin-bottom: 9px; }
.flow-card p { font-size: 13px; color: rgba(255,255,255,.72); line-height: 1.6; margin-bottom: 14px; }
.flow-card ul { display: grid; gap: 7px; }
.flow-card li { font-size: 12.5px; color: rgba(255,255,255,.82); padding-left: 14px; position: relative; }
.flow-card li::before { content: ""; position: absolute; left: 0; top: .55em; width: 5px; height: 5px; border-radius: 50%; background: var(--brand-400); }
/* 技术架构 pillars 变体（无图，顶部强调线） */
.flow.is-pillars .flow-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 14px; padding-bottom: 12px; border-bottom: 1px solid rgba(255,255,255,.12); }
.flow.is-pillars .flow-card ul { gap: 9px; }
.flow.is-pillars .flow-card li { font-size: 13px; line-height: 1.55; }

/* ── 协议 / 集成 chips ── */
.protocols { background: var(--white); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.chip-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex; align-items: baseline; gap: 8px; padding: 10px 16px; border-radius: var(--radius-pill);
  background: var(--paper); border: 1px solid var(--line-soft); font-size: 13px; font-weight: 600; color: var(--ink-600);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}
.chip:hover { border-color: var(--line); transform: translateY(-2px); }
.chip strong { color: var(--brand-600); font-weight: 800; font-family: var(--font-display); letter-spacing: .03em; font-size: 12px; }

/* ── 场景卡片（渐变面 + 顶部编号，统一语义）── */
.scenarios { background: var(--paper); }
.scene-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.scene {
  position: relative; overflow: hidden; border-radius: var(--radius); min-height: 200px; padding: 26px;
  color: #fff; display: flex; flex-direction: column; justify-content: flex-end; isolation: isolate;
}
.scene-1 { background: linear-gradient(150deg, #0d2650, #1a5cc4 65%, #3dabf5); }
.scene-2 { background: linear-gradient(150deg, #0a2558, #0d4d9f 55%, #32a2f4); }
.scene-3 { background: linear-gradient(150deg, #132d56, #1a86ef 55%, #5ac0ff); }
.scene-4 { background: linear-gradient(150deg, #06172e, #0f6feb 62%, #6bc0ff); }
.scene-5 { background: linear-gradient(150deg, #0f2d55, #1a86ef 58%, #72c8ff); }
.scene-6 { background: linear-gradient(150deg, #081f45, #0a4fcc 58%, #5ab8ff); }
.scene::before {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    linear-gradient(180deg, transparent 35%, rgba(0,0,0,.32)),
    radial-gradient(circle at 86% 14%, rgba(255,255,255,.18), transparent 42%);
}
.scene > * { position: relative; z-index: 2; }
.scene__no {
  position: absolute; top: 22px; left: 26px; font-family: var(--font-display); font-size: 12px;
  font-weight: 700; letter-spacing: .14em; color: rgba(255,255,255,.55); z-index: 2;
}
.scene h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; letter-spacing: -.01em; }
.scene p { font-size: 13px; color: rgba(255,255,255,.88); line-height: 1.6; max-width: 34em; }

/* ── 数据表（交付构成 / 产品组成 / 技术规格）── */
.stack, .modules { background: var(--white); }
.table-card { border: 1px solid var(--line-soft); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.data-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.data-table th, .data-table td { text-align: left; padding: 16px 20px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
.data-table thead th {
  font-family: var(--font-display); font-size: 11px; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--brand-600); background: var(--paper); padding: 14px 20px;
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr { transition: background .2s var(--ease); }
.data-table tbody tr:hover { background: var(--paper); }
.data-table td:first-child { font-weight: 700; white-space: nowrap; }
.data-table td[col-width="22"] { width: 22%; }
.data-table td[col-width="20"] { width: 20%; }
.data-table td[col-width="24"] { width: 24%; }
.data-table tbody td.muted { color: var(--ink-400); font-size: 13px; }
.data-table tbody td.body { color: var(--ink-600); }

/* ── CTA ── */
.cta {
  background: linear-gradient(135deg, #06122a 0%, #0b57d0 52%, #1f7fe8 100%);
  color: #fff; position: relative; overflow: hidden;
}
.cta::before {
  content: ""; position: absolute; width: 520px; height: 520px; right: -160px; top: -200px;
  background: radial-gradient(circle, rgba(91,184,251,.4), transparent 65%); pointer-events: none;
}
.cta .wrap { position: relative; z-index: 1; display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 40px; align-items: center; }
.cta .kicker { color: var(--brand-400); }
.cta h2 { font-family: var(--font-display); font-size: clamp(26px, 3.4vw, 40px); font-weight: 800; letter-spacing: -.02em; line-height: 1.12; margin-bottom: 14px; }
.cta h2 em { font-style: normal; color: #bfe4ff; }
.cta p { color: rgba(255,255,255,.86); margin-bottom: 26px; max-width: 38em; font-size: 15px; line-height: 1.6; }
.cta .btn-primary { background: #fff; color: var(--brand-800); }
.cta .btn-primary:hover { background: var(--brand-400); color: var(--brand-800); }
.cta .btn-outline { color: #fff; border-color: rgba(255,255,255,.34); }
.cta .btn-outline:hover { border-color: rgba(255,255,255,.7); background: rgba(255,255,255,.08); }
.cta-panel {
  background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--radius); padding: 26px; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.cta-panel h3 { font-size: 14px; font-weight: 700; margin-bottom: 16px; letter-spacing: .04em; }
.cta-panel dl { display: grid; gap: 14px; }
.cta-panel dt { font-family: var(--font-display); font-size: 10px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: rgba(255,255,255,.5); margin-bottom: 3px; }
.cta-panel dd { font-size: 14px; font-weight: 600; }
.cta-panel a { color: #fff; border-bottom: 1px solid rgba(255,255,255,.4); }
.cta-panel a:hover { border-bottom-color: #fff; }

/* CTA 居中变体（Echo / KMP closing） */
.cta--center .wrap { grid-template-columns: 1fr; text-align: center; }
.cta--center .cta-row { justify-content: center; }
.cta--center p { margin-left: auto; margin-right: auto; }

/* ── Footer（品牌列 + 分组链接 + 视觉收尾，非普通横条）── */
footer {
  position: relative; background: var(--brand-800); color: rgba(255,255,255,.55);
  padding: var(--sp-8) 0 var(--sp-5); font-size: 13px; overflow: hidden;
}
footer::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--brand-400), transparent);
}
footer::after {
  content: ""; position: absolute; width: 420px; height: 420px; left: -120px; bottom: -220px;
  background: radial-gradient(circle, rgba(91,184,251,.16), transparent 65%); pointer-events: none;
}
.footer-grid {
  position: relative; z-index: 1; display: grid; grid-template-columns: 1.4fr 2fr; gap: 40px;
  padding-bottom: var(--sp-6); border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-brand .brand-mark { margin-bottom: 14px; }
.footer-brand .brand-mark img,
.footer-brand .brand-mark .brand-logo { width: 40px; height: 40px; }
.footer-tag { color: rgba(255,255,255,.6); max-width: 28em; line-height: 1.7; }
.footer-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.footer-col h4 { font-family: var(--font-display); font-size: 11px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--brand-400); margin-bottom: 14px; }
.footer-col a, .footer-col span { display: block; color: rgba(255,255,255,.7); font-size: 13px; padding: 5px 0; transition: color .2s var(--ease); }
.footer-col a:hover { color: #fff; }
.footer-base {
  position: relative; z-index: 1; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  align-items: center; padding-top: var(--sp-5); font-size: 12px; color: rgba(255,255,255,.5);
}
.footer-base .mark { font-family: var(--font-display); color: #fff; font-size: 13px; font-weight: 800; letter-spacing: .08em; }

/* ── 动效 ── */
@keyframes rise { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: translateY(0); } }
@keyframes floatY { 0%, 100% { transform: translateY(0) rotate(-2deg); } 50% { transform: translateY(-14px) rotate(0deg); } }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s var(--ease-out), transform .6s var(--ease-out); }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ── 响应式（断点细化：1100 / 860 / 600）── */
@media (max-width: 1100px) {
  .flow, .cta .wrap { grid-template-columns: 1fr; }
  .flow.is-steps .flow-card:not(:last-child)::after { content: "↓"; right: 50%; top: auto; bottom: -14px; transform: translateX(50%); }
  .split-grid { grid-template-columns: 1fr; gap: 36px; }
  .split-grid > .split-visual, .split-grid > .metric-panel { order: -1; }
}
@media (max-width: 860px) {
  .card-grid, .scene-grid, .code-grid { grid-template-columns: 1fr; }
  .hero__inner { padding-top: 110px; }
  section { padding: var(--sp-8) 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 600px) {
  .wrap { width: calc(100% - 32px); }
  .card-grid { grid-template-columns: 1fr; }
  .hero__strip .spec { padding: 8px 0; border-left: none; width: 100%; }
  .hero__strip { gap: 4px; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .topbar { padding: 12px 16px; }
  .topbar .brand-mark .sub { display: none; }
}

/* ── 打印（宣传手册导出 PDF）── */
@media print {
  .topbar { display: none !important; }
  body { background: #fff; }
  .hero { min-height: auto; height: 100vh; page-break-after: always; }
  section { padding: 34px 0; page-break-inside: avoid; }
  .section--dark, .cta, .closing, .hero { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .btn, .card:hover, .flow-card:hover, .scene, .split-visual img { transform: none !important; }
}
@page { size: A4; margin: 12mm; }