:root {
  --ink: #12141a;
  --ink-2: #24272f;
  --ink-soft: #565c68;
  --paper: #fffdfa;
  --cloud: #f6f7f6;
  --line: #dfe5e5;
  --orange: #f97316;
  --orange-dark: #e6530b;
  --orange-deep: #c2410c;
  --orange-light: #fff0e4;
  --mint: #35d7bd;
  --mint-dark: #0c8f80;
  --violet: #a792ff;
  --dark: #0a0c11;
  --dark-2: #12151c;
  --dark-3: #171b23;
  /* 深底专用亮橙：品牌橙 #f97316 在近黑底上偏闷，大字改更亮一档；浅底与按钮仍用品牌橙 */
  --orange-bright: #ff6b35;
  --white: #ffffff;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --shadow: 0 18px 50px rgba(22, 31, 41, 0.09);
  --font: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* 四类能力强调色：收敛到同一色族，图标与文字链接共用同一色相 */
  --accent-1: #e6530b;
  --accent-1-bg: #fff0e4;
  --accent-2: #6b58ce;
  --accent-2-bg: #f0edff;
  --accent-3: #0c8f80;
  --accent-3-bg: #e6f8f4;
  --accent-4: #14708c;
  --accent-4-bg: #e8f4f8;

  /* 中文标题字距：负字距是给拉丁字偶距用的，汉字只需极轻微收紧 */
  --track-display: -.02em;
  --track-heading: -.016em;
  --track-title: -.012em;

  /* 区块垂直留白：统一节奏，替代原先逐节写死的 padding */
  --section-pad: clamp(80px, 4vw + 52px, 112px);

  /* 小字区：12 / 13 / 14 / 16，用途分离——微标签 / 辅助说明 / 小正文 / 正文 */
  --type-micro: .75rem;
  --type-meta: .8125rem;
  /* 英文眉标用固定值：原先的 clamp 在桌面端会算出 12.83px，与 13px 无区分度却多出一个档位 */
  --type-label: .8125rem;
  --type-ui: clamp(.8125rem, .78rem + .12vw, .875rem);
  /* 顶部导航专用：比 --type-ui 大一档，让导航在 88px 高的栏里有足够视觉重量 */
  --type-nav: clamp(.9375rem, .9rem + .16vw, 1rem);
  /* 品牌名：导航里最重的一级，字号压过导航项，形成层级。
     用固定档而非 clamp——导航在 850px 处隐显切换，clamp 会让 501-850px
     （导航已隐藏、空间充裕）顶到上限，反而比更宽的 851px 处更大。 */
  --type-brand: .9375rem;
  --type-body: 1rem;
  --type-lead: clamp(1rem, .96rem + .28vw, 1.125rem);
  --type-card-title: clamp(1.1875rem, 1.12rem + .28vw, 1.25rem);
  /* 标题阶梯按 1.3~1.43 递进：20(卡片) / 28(陈述) / 40(区块内) / 52(章节) / 72(主标题) */
  --type-heading-statement: clamp(1.4375rem, 1.15rem + .9vw, 1.75rem);
  --type-heading-compact: clamp(1.875rem, 1.35rem + 1.35vw, 2.5rem);
  --type-heading-section: clamp(2.125rem, 1.5rem + 2.4vw, 3.25rem);
  --type-heading-hero: clamp(2.625rem, 1.7rem + 3.9vw, 4.5rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body { margin: 0; min-width: 320px; color: var(--ink); background: var(--paper); font-family: var(--font); line-height: 1.6; -webkit-font-smoothing: antialiased; }
body.menu-open { overflow: hidden; }
button, a { font: inherit; }
a { color: inherit; }
button { color: inherit; }
img { max-width: 100%; }
:focus-visible { outline: 3px solid rgba(53, 215, 189, .9); outline-offset: 4px; }

.shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.section { padding: var(--section-pad) 0; position: relative; overflow: clip; }
.section-dark { position: relative; color: #f9fbff; overflow: hidden; background: var(--dark); }
.section-tint { background: #f6f7f5; }
.skip-link { position: fixed; z-index: 1000; left: 16px; top: -60px; padding: 9px 14px; color: #041017; background: var(--mint); border-radius: 8px; text-decoration: none; transition: top .2s ease; }
.skip-link:focus { top: 104px; }

/* Header */
.site-header { position: fixed; z-index: 60; top: 0; left: 0; right: 0; color: white; transition: background-color .28s ease, box-shadow .28s ease; }
/* 固定导航的滚动切换：深色区（hero + value-strip）内保持透明+白字，
   滚入浅色区后切换为浅色毛玻璃+深字，保证任何区块下都清晰可读。
   切换点由 .nav-sentinel 标记，避免在深色区中途就变白底。 */
.nav-sentinel { height: 1px; margin-top: -1px; pointer-events: none; }
.site-header.is-scrolled { color: var(--ink); background: rgba(255,253,250,.97); box-shadow: 0 1px 0 rgba(17,24,39,.07), 0 12px 30px rgba(12,22,36,.06); }
@supports ((backdrop-filter: blur(4px)) or (-webkit-backdrop-filter: blur(4px))) {
  .site-header.is-scrolled { background: rgba(255,253,250,.82); backdrop-filter: saturate(180%) blur(16px); -webkit-backdrop-filter: saturate(180%) blur(16px); }
}
.site-header.is-scrolled .brand-copy small { color: var(--ink-soft); }
.site-header.is-scrolled .desktop-nav a { color: var(--ink-soft); }
.site-header.is-scrolled .desktop-nav a::after { background: var(--orange); }
/* 浅色底上用更深的橙，保证小字达到 4.5:1 对比度 */
.site-header.is-scrolled .desktop-nav a:hover, .site-header.is-scrolled .desktop-nav a.is-current { color: var(--orange-deep); }
.site-header.is-scrolled .nav-contact { color: var(--ink); border-color: rgba(17,24,39,.16); }
.site-header.is-scrolled .nav-contact span { color: var(--mint-dark); }
.site-header.is-scrolled .nav-contact:hover { border-color: var(--orange); background: var(--orange-light); }
.site-header.is-scrolled .menu-toggle { border-color: rgba(17,24,39,.14); background: rgba(17,24,39,.04); }
.site-header.is-scrolled .menu-toggle span { background: var(--ink); }
.nav-shell { height: 88px; display: flex; align-items: center; gap: 35px; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 13px; color: inherit; text-decoration: none; flex: 0 0 auto; }
/* 品牌徽标：正式 LOGO「AI 希朵」莲花电路标（原橙色渐变方块徽章已被替换）。
   只锁高度、宽度按图自然比例 1.304:1 自适应（46px 高 -> 约 60px 宽），不裁不拉。
   图自带深色底，故在浅色毛玻璃导航上呈一枚深色圆角徽章，在深色首屏/页脚上自然融入。 */
.brand-mark { display: block; height: 46px; width: auto; border-radius: 14px; box-shadow: 0 8px 20px rgba(4,8,14,.38); transition: transform .28s ease, box-shadow .28s ease; }
.brand:hover .brand-mark { transform: translateY(-1px) scale(1.04); box-shadow: 0 12px 26px rgba(4,8,14,.5); }
.brand-copy { display: grid; line-height: 1.16; gap: 4px; }
.brand-copy strong { font-size: var(--type-brand); font-weight: 800; letter-spacing: 0; transition: color .28s ease; }
/* 品牌名双色：品牌字染橙。默认亮橙（深底：hero/页脚），导航滚入浅色区后换深橙保证 5.3:1 */
.brand-accent { color: var(--orange-bright); }
.site-header.is-scrolled .brand-accent { color: var(--orange-deep); }
/* 副标做成带前缀短线的小标签，与页面 eyebrow 的线段风格统一 */
.brand-copy small { display: inline-flex; align-items: center; gap: 7px; font-size: var(--type-micro); color: rgba(255,255,255,.72); letter-spacing: .16em; transition: color .28s ease; }
.brand-copy small::before { content: ""; width: 14px; height: 1px; background: var(--mint); }
.desktop-nav { display: flex; justify-content: center; gap: 29px; margin-left: auto; }
.desktop-nav a { position: relative; font-size: var(--type-nav); color: rgba(255,255,255,.78); letter-spacing: .02em; text-decoration: none; transition: color .2s ease; }
.desktop-nav a::after { position: absolute; content: ""; width: 0; height: 1px; left: 0; bottom: -9px; background: var(--mint); transition: width .2s ease; }
.desktop-nav a:hover, .desktop-nav a.is-current { color: white; }
.desktop-nav a:hover::after, .desktop-nav a.is-current::after { width: 100%; }
.nav-contact { display: inline-flex; align-items: center; gap: 8px; padding: 11px 17px; font-size: var(--type-nav); color: white; border: 1px solid rgba(255,255,255,.27); border-radius: 100px; text-decoration: none; transition: color .28s ease, background .2s ease, border-color .2s ease, transform .2s ease; }
.nav-contact span { color: var(--mint); font-size: 1.125rem; line-height: .7; transition: color .28s ease; }
.nav-contact:hover { border-color: var(--mint); background: rgba(53,215,189,.1); transform: translateY(-1px); }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 0; border: 1px solid rgba(255,255,255,.25); border-radius: 11px; background: rgba(255,255,255,.06); cursor: pointer; transition: background-color .28s ease, border-color .28s ease; }
.menu-toggle span { display: block; width: 18px; height: 1px; margin: 5px auto; background: white; transition: transform .2s ease, background-color .28s ease; }
.mobile-menu, .menu-backdrop { display: none; }

/* Hero */
.hero { min-height: 700px; padding: calc(var(--section-pad) + 64px) 0 calc(var(--section-pad) - 8px); isolation: isolate; }
.hero-grid-bg { position: absolute; z-index: -3; inset: 0; opacity: .52; background-image: linear-gradient(rgba(146,152,166,.10) 1px, transparent 1px), linear-gradient(90deg, rgba(146,152,166,.10) 1px, transparent 1px); background-size: 56px 56px; mask-image: linear-gradient(90deg, black 0, rgba(0,0,0,.8) 56%, transparent 100%); }
.hero::after { position: absolute; z-index: -2; inset: 0; content: ""; background: radial-gradient(circle at 72% 44%, rgba(255,108,28,.14), transparent 19%), radial-gradient(circle at 82% 61%, rgba(53,215,189,.08), transparent 18%), linear-gradient(100deg, #0a0c11 11%, #12151d 80%, #0a0c11); }
.hero-orbit { position: absolute; z-index: -1; border: 1px solid rgba(255,255,255,.09); border-radius: 50%; pointer-events: none; }
.orbit-one { width: 720px; height: 720px; right: -220px; top: -74px; }
.orbit-two { width: 480px; height: 480px; right: -100px; top: 45px; border-color: rgba(249,115,22,.27); }
.hero-layout { display: grid; grid-template-columns: minmax(0, .91fr) minmax(500px, 1.09fr); gap: 52px; align-items: center; }
.eyebrow { display: flex; align-items: center; gap: 8px; margin: 0 0 22px; color: var(--orange-dark); font-size: var(--type-label); font-weight: 800; letter-spacing: .13em; }
.eyebrow span { display: block; width: 25px; height: 1px; background: currentColor; }
.eyebrow-light { color: var(--mint); }
.eyebrow-mint { color: var(--mint-dark); }
.hero h1 { max-width: 610px; margin: 0; font-size: var(--type-heading-hero); font-weight: 760; letter-spacing: var(--track-display); line-height: 1.1; }
h1 em, h2 em { color: var(--orange); font-style: normal; }
/* 深色底上的强调字改亮橙：品牌橙 #f97316 在近黑底上偏闷，亮档对比度更高 */
.hero h1 em, .section-dark h1 em, .section-dark h2 em { color: var(--orange-bright); }
.hero-summary { max-width: 490px; margin: 28px 0 30px; color: rgba(238,240,246,.84); font-size: var(--type-lead); line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 48px; padding: 0 19px; border-radius: 100px; font-size: var(--type-ui); font-weight: 700; text-decoration: none; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button span { font-size: 1.125rem; line-height: .8; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: white; background: linear-gradient(135deg, #ff8331, var(--orange-dark)); box-shadow: 0 10px 25px rgba(240, 95, 13, .26); }
.button-primary:hover { box-shadow: 0 16px 31px rgba(240, 95, 13, .37); }
.button-secondary { color: white; border: 1px solid rgba(255,255,255,.24); background: rgba(255,255,255,.06); }
.button-secondary:hover { border-color: rgba(53,215,189,.85); background: rgba(53,215,189,.1); }
.button-dark { color: white; background: var(--ink); box-shadow: 0 10px 25px rgba(17,24,39,.15); }
.button-full { width: 100%; }
.hero-footnote { display: flex; align-items: center; gap: 9px; margin-top: 34px; color: rgba(236,239,245,.7); font-size: var(--type-meta); line-height: 1.65; }
.pulse-dot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 5px rgba(53,215,189,.1); animation: breathe 2.5s ease-in-out infinite; }
@keyframes breathe { 50% { box-shadow: 0 0 0 9px rgba(53,215,189,.02); opacity: .65; } }

/* Hero graphical module —— AI 能力图谱
   中心橙圆代表 AI 中枢，四角节点是四类能力，中间用 SVG 连线打通。
   连线用 viewBox 0-100 + preserveAspectRatio:none，端点按百分比跟随节点，
   再配 vector-effect:non-scaling-stroke 保证线宽不被拉伸。 */
.hero-visual { position: relative; min-height: 520px; }
.visual-grid { position: absolute; inset: 0; opacity: .75; background: linear-gradient(90deg, rgba(150,156,170,.09) 1px, transparent 1px), linear-gradient(rgba(150,156,170,.09) 1px, transparent 1px); background-size: 28px 28px; mask-image: radial-gradient(circle at 53% 50%, black 8%, transparent 72%); }
.visual-glow { position: absolute; border-radius: 50%; filter: blur(28px); pointer-events: none; }
.glow-orange { width: 214px; height: 214px; left: calc(50% - 107px); top: calc(50% - 146px); background: rgba(255,107,53,.14); }
.glow-mint { width: 152px; height: 152px; right: 3%; bottom: 6%; background: rgba(53,215,189,.09); }
.graph-ring { position: absolute; left: 50%; top: 50%; border-radius: 50%; transform: translate(-50%, -50%); pointer-events: none; }
.ring-inner { width: 202px; height: 202px; border: 1px dashed rgba(255,255,255,.16); }
.ring-outer { width: 308px; height: 308px; border: 1px solid rgba(255,255,255,.1); }
/* 连线端点 y 取 9/87：节点 top 5% + 自身半高，正好落在节点垂直中心，线被节点盖住形成「插入」而非悬空 */
.graph-links { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.graph-links line { stroke-width: 1; vector-effect: non-scaling-stroke; }
/* 四条连线亮度拉平：橙色在近黑底上天然更亮，单独降一档才和其它三色视觉等重 */
.graph-links line:nth-child(1) { stroke: rgba(255,107,53,.45); }
.graph-links line:nth-child(2) { stroke: rgba(167,146,255,.45); }
.graph-links line:nth-child(3) { stroke: rgba(53,215,189,.45); }
.graph-links line:nth-child(4) { stroke: rgba(105,183,214,.45); }
.graph-core { position: absolute; left: 50%; top: 50%; display: grid; justify-items: center; gap: 11px; transform: translate(-50%, -50%); }
@keyframes corePulse { 50% { box-shadow: 0 0 0 15px rgba(255,107,53,.05), 0 0 46px rgba(255,107,53,.6); } }
.graph-core-dot { display: grid; place-items: center; width: 76px; height: 76px; color: white; border-radius: 50%; background: radial-gradient(circle at 36% 30%, #ffc79b, var(--orange-bright) 58%, #c9471b); box-shadow: 0 0 0 10px rgba(255,107,53,.08), 0 0 38px rgba(255,107,53,.5); animation: corePulse 3.6s ease-in-out infinite; }
.graph-core-dot svg { width: 32px; height: 32px; }
.graph-core strong { color: rgba(250,251,255,.95); font-size: .9375rem; font-weight: 800; letter-spacing: .06em; }
.graph-node { position: absolute; display: flex; align-items: center; gap: 10px; width: 176px; padding: 10px 12px; border: 1px solid rgba(255,255,255,.13); border-radius: 14px; background: rgba(26,31,41,.9); box-shadow: 0 14px 30px rgba(0,0,0,.3); backdrop-filter: blur(12px); }
.node-live { left: 0; top: 5%; }
.node-knowledge { right: 0; top: 5%; }
.node-model { left: 0; bottom: 9%; }
.node-geo { right: 0; bottom: 9%; }
.node-icon { display: grid; place-items: center; flex: 0 0 auto; width: 32px; height: 32px; border-radius: 10px; }
.node-icon svg { width: 18px; height: 18px; }
.icon-orange { color: white; background: linear-gradient(150deg, #ffa165, #e6530b); box-shadow: 0 6px 16px rgba(230,83,11,.32); }
.icon-violet { color: white; background: linear-gradient(150deg, #b3a3ff, #6b58ce); box-shadow: 0 6px 16px rgba(107,88,206,.32); }
.icon-mint { color: white; background: linear-gradient(150deg, #4ee8ce, #0c8f80); box-shadow: 0 6px 16px rgba(12,143,128,.32); }
.icon-sky { color: white; background: linear-gradient(150deg, #5cb8db, #14708c); box-shadow: 0 6px 16px rgba(20,112,140,.32); }
.node-text { display: grid; gap: 1px; min-width: 0; }
.node-text small { color: rgba(255,255,255,.55); font-size: var(--type-micro); font-weight: 800; letter-spacing: .1em; }
.node-text strong { color: rgba(255,255,255,.9); font-size: var(--type-meta); }
.visual-caption { position: absolute; bottom: 6px; left: 0; display: flex; align-items: center; gap: 7px; color: rgba(221,231,246,.56); font-size: var(--type-micro); letter-spacing: .1em; }.visual-caption span { width: 36px; height: 1px; background: rgba(221,231,246,.3); }

.value-strip { background: #14171f; color: white; }
.value-strip-grid { display: grid; grid-template-columns: 1.35fr repeat(3, 1fr); align-items: stretch; min-height: 92px; }.value-strip-grid > * { display: flex; align-items: center; margin: 0; padding: 20px 24px; border-left: 1px solid rgba(255,255,255,.1); }.value-strip-grid > :first-child { padding-left: 0; border: 0; color: rgba(255,255,255,.82); font-size: var(--type-lead); font-weight: 700; }.value-item { gap: 9px; color: rgba(255,255,255,.76); font-size: var(--type-meta); line-height: 1.65; }.value-item span { color: var(--orange); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-micro); }

/* General heading */
.section-heading { position: relative; z-index: 2; margin-bottom: 60px; }.split-heading { display: grid; grid-template-columns: 1.2fr .8fr; gap: 60px; align-items: end; }.section-heading h2 { max-width: 670px; margin: 0; color: var(--ink); font-size: var(--type-heading-section); font-weight: 760; letter-spacing: var(--track-heading); line-height: 1.18; }.section-heading > p { max-width: 410px; margin: 0 0 4px; color: var(--ink-soft); font-size: var(--type-lead); line-height: 1.85; }.split-heading-light h2 { color: white; }.split-heading-light > p { color: rgba(236,239,245,.8); }

/* Company */
.about { padding: calc(var(--section-pad) - 6px) 0; background: var(--paper); }
.about::before { position: absolute; inset: 0; z-index: 0; content: ""; background: linear-gradient(90deg, rgba(249,115,22,.035), transparent 36%), linear-gradient(180deg, transparent, rgba(53,215,189,.045)); }
.about-grid-bg { position: absolute; inset: 0; opacity: .48; background-image: linear-gradient(rgba(128,134,148,.075) 1px, transparent 1px), linear-gradient(90deg, rgba(128,134,148,.075) 1px, transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(90deg, transparent, black 26%, black 75%, transparent); }
.about-layout { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px 72px; align-items: start; }
.about-heading { grid-column: 1; grid-row: 1; }
.about-content { grid-column: 1; grid-row: 2; }
.about-heading h2 { max-width: 720px; margin: 0; color: var(--ink); font-size: var(--type-heading-section); font-weight: 760; letter-spacing: var(--track-heading); line-height: 1.18; }
.about-content { padding: 0; }
.about-content p { max-width: 490px; margin: 0; color: var(--ink-soft); font-size: var(--type-body); line-height: 1.85; }
.about-content .about-lead { margin-bottom: 18px; color: var(--ink-2); font-size: var(--type-lead); font-weight: 650; line-height: 1.8; }
.about-pillars { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 27px; }
.about-pillars span { padding: 6px 10px; color: #53626c; border: 1px solid #d8e1df; border-radius: 100px; background: rgba(255,255,255,.6); font-size: var(--type-meta); font-weight: 700; }
.about-pillars span:nth-child(1) { color: var(--orange-dark); border-color: #ffd6bf; background: #fff8f2; }
.about-pillars span:nth-child(4) { color: var(--mint-dark); border-color: #bde9e1; background: #f4fffc; }
.about-statement { grid-column: 2; grid-row: 1 / 3; align-self: center; justify-self: end; max-width: 460px; min-height: 263px; padding: 22px 20px; color: white; border-radius: 18px; background: linear-gradient(145deg, #1a1f29, #0d1015); box-shadow: 0 18px 37px rgba(19,31,43,.16); }
.about-statement-index { display: block; color: rgba(177,206,223,.7); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-micro); letter-spacing: .1em; }
.about-statement p { margin: 43px 0 20px; font-size: var(--type-heading-statement); font-weight: 720; letter-spacing: var(--track-title); line-height: 1.24; }
.about-statement p em { color: #69e4d4; font-style: normal; }
.about-statement-line { display: block; width: 48px; height: 1px; background: linear-gradient(90deg, var(--orange), var(--mint)); }
.about-statement small { display: block; margin-top: 15px; color: rgba(229,240,248,.74); font-size: var(--type-meta); line-height: 1.7; }

/* Capabilities */
.capability-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }.capability-card { display: flex; flex-direction: column; min-height: 420px; padding: 25px 23px 23px; border: 1px solid var(--line); border-radius: var(--radius-md); background: white; transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }.capability-card:hover { z-index: 1; transform: translateY(-7px); border-color: transparent; box-shadow: var(--shadow); }.capability-index { display: flex; align-items: center; justify-content: space-between; color: #818b94; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-meta); }.capability-index i { width: 25px; height: 1px; background: #d9dfe1; }.capability-icon { display: grid; place-items: center; width: 46px; height: 46px; margin: 39px 0 22px; border-radius: 13px; color: white; }.capability-icon svg { width: 25px; height: 25px; }.capability-card h3 { margin: 0 0 11px; font-size: var(--type-card-title); letter-spacing: var(--track-title); }.capability-card > p { min-height: 88px; margin: 0; color: var(--ink-soft); font-size: var(--type-ui); line-height: 1.8; }.capability-card ul { display: grid; gap: 6px; min-height: 88px; margin: 18px 0 20px; padding: 0; list-style: none; }.capability-card li { position: relative; padding-left: 18px; color: #647181; font-size: var(--type-ui); line-height: 1.6; }
/* 列表标记由圆点改为打勾：能力清单用勾更贴语义，颜色取卡片强调色，纯 CSS 画不加图标依赖 */
.capability-card li::before { position: absolute; left: 1px; top: .34em; width: 5px; height: 9px; content: ""; border-style: solid; border-width: 0 1.6px 1.6px 0; transform: rotate(45deg); }
.capability-card-live li::before { border-color: var(--accent-1); }
.capability-card-knowledge li::before { border-color: var(--accent-2); }
.capability-card-model li::before { border-color: var(--accent-3); }
.capability-card-geo li::before { border-color: var(--accent-4); }.text-link { display: inline-flex; align-items: center; gap: 9px; margin-top: auto; color: var(--ink); font-size: var(--type-ui); font-weight: 800; text-decoration: none; }.text-link span { font-size: 1rem; }.capability-card-live .capability-icon { background: linear-gradient(150deg, #ff9350, var(--accent-1)); box-shadow: 0 10px 22px rgba(230,83,11,.24); }.capability-card-live .text-link { color: var(--accent-1); }.capability-card-knowledge .capability-icon { background: linear-gradient(150deg, #8d7ae8, var(--accent-2)); box-shadow: 0 10px 22px rgba(107,88,206,.24); }.capability-card-knowledge .text-link { color: var(--accent-2); }.capability-card-model .capability-icon { background: linear-gradient(150deg, #23b9a6, var(--accent-3)); box-shadow: 0 10px 22px rgba(12,143,128,.24); }.capability-card-model .text-link { color: var(--accent-3); }.capability-card-geo .capability-icon { background: linear-gradient(150deg, #2f9ab8, var(--accent-4)); box-shadow: 0 10px 22px rgba(20,112,140,.24); }.capability-card-geo .text-link { color: var(--accent-4); }

/* Products */
.product-heading { display: grid; grid-template-columns: 1.2fr .8fr; align-items: end; gap: 60px; }.product-heading > p { max-width: 370px; margin-bottom: 4px; }.product-switcher { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-bottom: 42px; padding: 6px; border-radius: 16px; background: #e2e6e3; }.product-tab { display: flex; align-items: center; gap: 14px; padding: 16px; border: 0; border-radius: 11px; background: transparent; cursor: pointer; text-align: left; transition: background .2s ease, box-shadow .2s ease; }.product-tab.is-active { background: white; box-shadow: 0 5px 15px rgba(30,40,45,.08); }.tab-number { color: #7b8585; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-meta); }.tab-copy { display: grid; gap: 2px; }.tab-copy strong { font-size: var(--type-lead); letter-spacing: var(--track-title); }.tab-copy small { color: #6b7575; font-size: var(--type-meta); }.tab-arrow { margin-left: auto; color: #6f7978; font-size: 1.25rem; }.product-tab.is-active .tab-arrow { color: var(--orange); }.product-panel { display: grid; grid-template-columns: .92fr 1.08fr; align-items: center; gap: 60px; }.product-panel[hidden] { display: none; }.product-copy { padding-left: 8px; }.product-tag { display: inline-flex; align-items: center; gap: 7px; padding: 5px 10px 5px 7px; border-radius: 100px; font-size: var(--type-meta); font-weight: 800; }.product-tag img { width: 19px; height: 19px; object-fit: contain; }.product-tag-orange { color: var(--orange-dark); background: #fff0e6; }.product-tag-coral { color: #d9542e; background: #ffebe4; }.livefx-symbol { display: grid; place-items: center; width: 20px; height: 20px; color: white; border-radius: 6px; background: linear-gradient(135deg, #ff9d52, #fb6145); font-size: 1rem; }.product-copy h3 { margin: 23px 0 18px; font-size: var(--type-heading-compact); letter-spacing: var(--track-heading); line-height: 1.22; }.product-copy > p:not(.product-disclaimer) { max-width: 415px; color: var(--ink-soft); font-size: var(--type-body); line-height: 1.8; }.feature-list { display: grid; gap: 16px; margin-top: 28px; }.feature-list > div { display: flex; align-items: flex-start; gap: 13px; }.feature-mark { display: grid; place-items: center; flex: 0 0 auto; width: 25px; height: 25px; color: var(--orange-dark); border: 1px solid #ffd2b8; border-radius: 50%; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-micro); }.feature-list p { display: grid; gap: 2px; margin: 0; }.feature-list strong { font-size: var(--type-ui); }.feature-list small { color: #5d6b6b; font-size: var(--type-meta); line-height: 1.55; }.product-disclaimer { margin: 25px 0 0; color: #767f7e; font-size: var(--type-meta); line-height: 1.6; }.product-media { position: relative; min-width: 0; }.window-frame { overflow: hidden; border-radius: 17px; background: white; box-shadow: 0 22px 51px rgba(33,43,44,.15); }.frame-orange { border: 1px solid #ffd5bb; }.frame-coral { border: 1px solid #ffd4c3; }.window-top { display: flex; align-items: center; gap: 5px; height: 35px; padding: 0 13px; border-bottom: 1px solid #f1ebe6; background: #fffcf9; }.window-top span { width: 7px; height: 7px; border-radius: 50%; }.window-top span:nth-child(1) { background: #ff9076; }.window-top span:nth-child(2) { background: #f7cf60; }.window-top span:nth-child(3) { background: #86d4a5; }.window-top p { margin: 0 0 0 6px; color: #9c9a96; font-size: var(--type-micro); }.image-wrap { overflow: hidden; background: #f8f1eb; }.image-wrap img { display: block; width: 100%; height: auto; }.image-wrap-teleprompter, .image-wrap-livefx { max-height: 420px; mask-image: linear-gradient(180deg, black 74%, transparent 100%); -webkit-mask-image: linear-gradient(180deg, black 74%, transparent 100%); }.media-annotation { position: absolute; display: flex; align-items: center; gap: 7px; color: #737c7b; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-micro); letter-spacing: .1em; }.media-annotation i { display: inline-block; width: 32px; height: 1px; background: currentColor; }.annotation-top { top: -18px; left: 7px; }.annotation-bottom { bottom: -20px; right: 7px; }

/* Build path */
.model-path { padding-bottom: var(--section-pad); }.model-bg-grid { position: absolute; inset: 0; opacity: .47; background-image: linear-gradient(rgba(150,156,170,.075) 1px, transparent 1px), linear-gradient(90deg, rgba(150,156,170,.075) 1px, transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(transparent, black 24%, black 74%, transparent); }.intelligence-board { position: relative; overflow: hidden; border: 1px solid rgba(255,255,255,.14); border-radius: 20px; background: linear-gradient(130deg, rgba(28,33,44,.86), rgba(11,14,20,.92)); box-shadow: 0 26px 60px rgba(0,0,0,.25); }.intelligence-board::before { position: absolute; top: -260px; right: -80px; width: 520px; height: 520px; border-radius: 50%; content: ""; background: radial-gradient(circle, rgba(53,215,189,.12), transparent 62%); }.board-head { position: relative; display: flex; justify-content: space-between; padding: 18px 23px; border-bottom: 1px solid rgba(255,255,255,.1); color: rgba(240,246,255,.84); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-meta); letter-spacing: .1em; }.board-head > div { display: flex; align-items: center; gap: 8px; }.board-live-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 9px var(--mint); }.board-head small { color: rgba(240,246,255,.6); font-size: var(--type-micro); }.flow-steps { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); margin: 0; padding: 56px 34px 49px; list-style: none; }.flow-steps::before { position: absolute; z-index: 0; right: 12.5%; left: 12.5%; top: 95px; height: 1px; content: ""; background: linear-gradient(90deg, rgba(167,146,255,.15), rgba(53,215,189,.78), rgba(249,115,22,.35)); }.flow-steps li { position: relative; z-index: 1; display: grid; justify-items: center; text-align: center; }.step-count { position: absolute; top: -24px; color: rgba(239,245,252,.6); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-meta); }.step-icon { display: grid; place-items: center; width: 50px; height: 50px; color: #bdd0e2; border: 1px solid rgba(159,182,205,.6); border-radius: 50%; background: #172640; }.step-icon svg { width: 22px; height: 22px; }.flow-steps li strong { margin-top: 15px; color: rgba(249,251,255,.94); font-size: var(--type-ui); }.flow-steps li small { max-width: 168px; margin-top: 4px; color: rgba(225,235,247,.72); font-size: var(--type-meta); line-height: 1.55; }.flow-steps .step-emphasis .step-icon { color: #ffae7b; border-color: rgba(249,115,22,.85); background: #3c2a29; box-shadow: 0 0 0 7px rgba(249,115,22,.09), 0 0 23px rgba(249,115,22,.24); }.flow-steps .step-emphasis strong { color: #ffbf93; }.board-footer { position: relative; display: flex; align-items: center; justify-content: center; gap: 20px; padding: 17px 23px; border-top: 1px solid rgba(255,255,255,.08); }.board-footer p { margin: 0; color: rgba(234,242,251,.54); font-size: var(--type-meta); line-height: 1.6; }.signal-chain { display: flex; gap: 3px; }.signal-chain i { width: 4px; height: 4px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 6px var(--mint); }.signal-chain i:nth-child(2n) { opacity: .4; }

/* GEO */
.geo { padding-bottom: calc(var(--section-pad) - 22px); background: #f9fbfa; }.geo-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 64px; align-items: center; }.geo-copy h2 { margin: 0 0 20px; font-size: var(--type-heading-section); font-weight: 760; letter-spacing: var(--track-heading); line-height: 1.16; }.geo-copy h2 em { color: var(--mint-dark); }.geo-copy > p { max-width: 410px; margin: 0 0 27px; color: var(--ink-soft); font-size: var(--type-body); line-height: 1.85; }.geo-map { position: relative; min-height: 462px; overflow: hidden; border: 1px solid #cce8e0; border-radius: 20px; background-color: #e8f7f4; background-image: linear-gradient(32deg, transparent 47%, rgba(52,145,133,.24) 48%, rgba(52,145,133,.24) 50%, transparent 51%), linear-gradient(-33deg, transparent 48%, rgba(52,145,133,.21) 49%, rgba(52,145,133,.21) 51%, transparent 52%), linear-gradient(86deg, transparent 49%, rgba(52,145,133,.16) 50%, rgba(52,145,133,.16) 51%, transparent 52%); background-size: 100px 100px, 145px 145px, 180px 180px; box-shadow: 0 20px 46px rgba(15,91,81,.12); }.geo-map::before { position: absolute; inset: 0; content: ""; opacity: .74; background-image: radial-gradient(circle, rgba(33,127,118,.62) 1px, transparent 1px); background-size: 17px 17px; mask-image: linear-gradient(115deg, transparent 8%, black 44%, transparent 88%); }.map-coordinate { position: absolute; color: rgba(16,88,79,.88); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-micro); letter-spacing: .08em; }.coordinate-one { top: 20px; left: 21px; }.coordinate-two { right: 21px; bottom: 18px; }.map-ring { position: absolute; border: 1px solid rgba(24,149,136,.52); border-radius: 50%; }.ring-a { width: 320px; height: 320px; top: 74px; left: 195px; }.ring-b { width: 188px; height: 188px; top: 140px; left: 261px; border-style: dashed; }.map-route { position: absolute; height: 1px; transform-origin: 0; background: linear-gradient(90deg, rgba(9,138,125,.1), rgba(9,138,125,.8), rgba(249,115,22,.4)); }.route-a { width: 252px; top: 213px; left: 156px; transform: rotate(-21deg); }.route-b { width: 197px; top: 243px; left: 374px; transform: rotate(38deg); }.map-dot { position: absolute; z-index: 2; width: 7px; height: 7px; border: 2px solid #e7fbf8; border-radius: 50%; background: #159b8b; box-shadow: 0 0 0 5px rgba(21,155,139,.13); }.dot-one { top: 151px; left: 186px; }.dot-two { top: 287px; left: 242px; }.dot-three { top: 113px; right: 143px; background: var(--orange); }.dot-four { bottom: 102px; right: 112px; }.map-location { position: absolute; z-index: 3; top: 193px; left: 304px; display: grid; justify-items: center; }.map-location > span { width: 47px; height: 47px; margin-bottom: 8px; border: 11px solid #fbfffe; border-radius: 50% 50% 50% 0; background: linear-gradient(135deg, #51ddcb, #168d80); box-shadow: 0 8px 18px rgba(11,111,99,.26); transform: rotate(-45deg); }.map-location > span::after { display: block; width: 10px; height: 10px; margin: 8px; content: ""; border-radius: 50%; background: white; }.map-location b { color: #0d766b; font-size: var(--type-ui); }.map-location small { color: rgba(10,90,82,.88); font-size: var(--type-micro); }.map-card { position: absolute; z-index: 2; display: grid; gap: 1px; min-width: 130px; padding: 10px 12px; border: 1px solid rgba(27,140,128,.22); border-radius: 11px; background: rgba(255,255,255,.8); box-shadow: 0 10px 24px rgba(15,104,94,.1); backdrop-filter: blur(8px); }.map-card span { color: #197a6f; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-micro); letter-spacing: .07em; }.map-card strong { color: #195c56; font-size: var(--type-meta); }.map-card small { color: #5b7c77; font-size: var(--type-micro); }.map-card-journey { top: 81px; right: 45px; }.map-card-local { bottom: 70px; left: 61px; }.map-label { position: absolute; color: rgba(13,105,95,.86); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-micro); letter-spacing: .07em; }.label-a { top: 153px; right: 86px; }.label-b { top: 294px; left: 111px; }.label-c { bottom: 124px; right: 228px; }.geo-scenarios { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 53px; }.geo-scenario { display: flex; align-items: flex-start; gap: 14px; padding: 21px 18px; border-top: 1px solid #aecdc6; }.scenario-index { color: #2f8a80; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-meta); }.geo-scenario h3 { margin: -4px 0 3px; font-size: var(--type-card-title); }.geo-scenario p { margin: 0; color: #5f6f6d; font-size: var(--type-meta); line-height: 1.65; }.scenario-arrow { margin-left: auto; color: var(--mint-dark); font-size: 1rem; }

/* Delivery */
.delivery-timeline { display: grid; grid-template-columns: repeat(4, 1fr); margin: 0; padding: 0; list-style: none; }.delivery-step { position: relative; padding: 0 27px 0 0; }.delivery-number { position: relative; z-index: 1; display: grid; place-items: center; width: 48px; height: 48px; color: var(--orange-dark); border: 1px solid #fac8ab; border-radius: 50%; background: #fffaf6; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-meta); }.delivery-line { position: absolute; top: 24px; right: 0; left: 48px; height: 1px; background: #d3dad6; }.delivery-step:last-child .delivery-line { display: none; }.delivery-content { margin-top: 22px; }.delivery-content p { margin: 0 0 4px; color: #78817f; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: var(--type-micro); letter-spacing: .1em; }.delivery-content h3 { margin: 0 0 8px; font-size: var(--type-card-title); letter-spacing: var(--track-title); }.delivery-content span { display: block; max-width: 215px; color: #5e6c6b; font-size: var(--type-ui); line-height: 1.75; }

/* Contact / footer */
/* 联系管道的邮箱/电话本身只有 22px 高（行内文本），给链接补纵向 padding 撑到 44px 触控目标，
   用负 margin 抵掉多出来的空间，视觉位置不变 */
.channel-body a { display: inline-flex; align-items: center; min-height: 44px; margin: -11px 0; }
.contact { padding: var(--section-pad) 0; }.contact::before { position: absolute; inset: 0; z-index: -1; content: ""; background: radial-gradient(circle at 76% 55%, rgba(249,115,22,.2), transparent 18%), linear-gradient(110deg, #12151d, #0c0f15); }.contact-radiance { position: absolute; z-index: -1; right: 5%; top: -100px; width: 600px; height: 600px; border: 1px solid rgba(255,255,255,.08); border-radius: 50%; box-shadow: 0 0 0 55px rgba(255,255,255,.025), 0 0 0 130px rgba(255,255,255,.015); }.contact-layout { display: grid; grid-template-columns: 1.22fr .78fr; gap: 70px; align-items: center; }.contact h2 { margin: 0; font-size: var(--type-heading-section); font-weight: 760; letter-spacing: var(--track-heading); line-height: 1.18; }.contact-card { padding: 28px; border: 1px solid rgba(255,255,255,.17); border-radius: 19px; background: rgba(255,255,255,.07); box-shadow: 0 21px 44px rgba(0,0,0,.17); backdrop-filter: blur(14px); }.contact-card-icon { display: grid; place-items: center; width: 42px; height: 42px; color: #ffb38a; border-radius: 12px; background: rgba(249,115,22,.15); }.contact-card-icon svg { width: 22px; height: 22px; }.contact-card h3 { margin: 18px 0 6px; font-size: var(--type-card-title); }.contact-card > p:not(.contact-note) { margin: 0 0 21px; color: rgba(237,244,251,.76); font-size: var(--type-ui); line-height: 1.75; }.contact-topics { display: flex; flex-wrap: wrap; gap: 7px; margin: 0 0 6px; }.contact-topics span { padding: 5px 11px; color: rgba(233,242,250,.88); border: 1px solid rgba(255,255,255,.2); border-radius: 100px; background: rgba(255,255,255,.05); font-size: var(--type-meta); font-weight: 700; }.contact-note { display: flex; gap: 7px; margin: 15px 0 0; color: rgba(234,242,250,.68); font-size: var(--type-meta); line-height: 1.6; }.contact-note span { flex: 0 0 auto; width: 5px; height: 5px; margin-top: 6px; border-radius: 50%; background: var(--mint); }.contact-channels { display: grid; margin: 10px 0 0; padding: 0; list-style: none; }.contact-channels li { display: flex; align-items: center; gap: 12px; padding: 13px 0; border-top: 1px solid rgba(255,255,255,.1); }.channel-icon { display: grid; place-items: center; flex: 0 0 auto; width: 40px; height: 40px; color: #ffb38a; border: 1px solid rgba(249,115,22,.28); border-radius: 11px; background: rgba(249,115,22,.13); }.channel-icon svg { width: 19px; height: 19px; }.channel-body { display: grid; gap: 2px; min-width: 0; }.channel-body small { color: rgba(237,244,251,.62); font-size: var(--type-micro); letter-spacing: .06em; }.channel-body a, .channel-body span { color: rgba(244,248,253,.94); font-size: var(--type-ui); font-weight: 700; text-decoration: none; }.channel-body a:hover { color: #ffb38a; }.contact-qr { position: relative; flex: 0 0 auto; width: 104px; height: 104px; margin-left: auto; padding: 6px; border-radius: 12px; background: white; text-decoration: none; }.contact-qr img { display: block; width: 100%; height: 100%; object-fit: contain; }.contact-qr-zoom { position: absolute; inset: auto 0 0; display: grid; place-items: center; height: 22px; color: white; border-radius: 0 0 8px 8px; background: rgba(17, 24, 39, .82); font-size: var(--type-micro); letter-spacing: .06em; opacity: 0; transition: opacity .2s ease; }.contact-qr:hover .contact-qr-zoom, .contact-qr:focus-visible .contact-qr-zoom { opacity: 1; }.site-footer { color: rgba(239,244,250,.6); background: #07080c; }.footer-top { display: flex; justify-content: space-between; align-items: center; gap: 30px; padding: 38px 0; }.brand-footer .brand-copy small { color: rgba(255,255,255,.62); }.footer-links { display: flex; flex-wrap: wrap; gap: 22px; }.footer-links a { color: rgba(239,244,250,.74); font-size: var(--type-meta); text-decoration: none; padding: 10px 2px; }.footer-links a:hover { color: white; }.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding: 17px 0 20px; border-top: 1px solid rgba(255,255,255,.09); }.footer-bottom p { margin: 0; color: rgba(239,244,250,.6); font-size: var(--type-meta); line-height: 1.55; }.footer-bottom .icp { display: inline-flex; align-items: center; min-height: 24px; color: rgba(239,244,250,.6); text-decoration: none; transition: color .2s ease; }.footer-bottom .icp:hover { color: rgba(239,244,250,.9); }

/* Back to top
   整页约 6800px，需要一个随时可用的返回入口。默认态用 visibility 而不是 hidden 属性：
   既保留淡入过渡，又不会被 Tab 聚焦（hidden 属性会直接去掉 transition）。 */
.to-top { position: fixed; z-index: 55; right: clamp(15px, 2.6vw, 30px); bottom: clamp(15px, 2.6vw, 30px); display: grid; place-items: center; width: 52px; height: 52px; padding: 0; border: 0; border-radius: 50%; color: white; background: linear-gradient(135deg, #ff8b3d, var(--orange-dark)); box-shadow: 0 14px 30px rgba(234, 88, 12, .32), inset 0 1px 0 rgba(255, 255, 255, .32); cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(14px); transition: opacity .26s ease, visibility .26s ease, transform .26s ease; }
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { transform: translateY(-3px); }
.to-top-arrow { font-size: 1.25rem; line-height: 1; }
.to-top-progress { position: absolute; inset: -7px; transform: rotate(-90deg); pointer-events: none; }
.to-top-track { fill: none; stroke: rgba(255, 255, 255, .34); stroke-width: 2; }
.to-top-bar { fill: none; stroke: var(--mint); stroke-width: 2.5; stroke-linecap: round; }

/* Interactions */
.reveal { opacity: 0; transform: translateY(23px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.75,.3,1); }.reveal.is-visible { opacity: 1; transform: none; }.reveal-delay-1 { transition-delay: .1s; }.reveal-delay-2 { transition-delay: .2s; }.reveal-delay-3 { transition-delay: .3s; }

@media (max-width: 1050px) {
  :root { --type-heading-section: clamp(1.75rem, 1.15rem + 1.9vw, 2.5rem); }.hero-layout { grid-template-columns: 1fr 1fr; gap: 24px; }.graph-node { width: 150px; padding: 9px 10px; gap: 8px; }.node-icon { width: 28px; height: 28px; }.graph-ring { display: none; }.split-heading, .product-heading { grid-template-columns: 1.3fr .7fr; gap: 40px; }.geo-layout { grid-template-columns: 1fr 1fr; }.contact-layout { grid-template-columns: 1fr; gap: 34px; }.contact-card { max-width: 560px; }.about-layout { grid-template-columns: .9fr 1.1fr; gap: 35px; }.about-heading { grid-column: auto; grid-row: auto; }.about-content { grid-column: auto; grid-row: auto; padding-left: 28px; }.about-statement { grid-column: 1 / -1; grid-row: auto; align-self: auto; justify-self: auto; max-width: none; }.about-statement { grid-column: 1 / -1; min-height: auto; display: grid; grid-template-columns: .62fr 1fr; column-gap: 35px; align-items: center; }.about-statement p { margin: 22px 0 0; }.about-statement-line { display: none; }.about-statement small { margin: 0; }.capability-grid { grid-template-columns: repeat(2, 1fr); }.capability-card { min-height: 365px; }.capability-card > p { min-height: auto; }.product-panel { grid-template-columns: 1fr 1fr; gap: 44px; }.geo-layout { gap: 45px; }.map-ring.ring-a { left: 150px; }.map-ring.ring-b { left: 216px; }.map-location { left: 258px; }.route-a { left: 112px; }.route-b { left: 328px; }.delivery-step { padding-right: 17px; }
}

/* 1121px 以上：shell 有 1072→1180px 的余量，品牌名放大到 17px 增强存在感 */
@media (min-width: 1121px) {
  :root { --type-brand: 1.0625rem; }
}

/* 851-1120px：此时 shell 最窄只有约 803px，放大的品牌区 + 导航会互相挤压，
   这一区间回落到接近原尺寸，1121px 以上才用完整的大字号。 */
@media (min-width: 851px) and (max-width: 1120px) {
  :root { --type-nav: .875rem; }
  .nav-shell { gap: 16px; }.desktop-nav { gap: 18px; }.brand { gap: 11px; }.brand-mark { height: 40px; border-radius: 12px; }
}

@media (min-width: 781px) and (max-width: 850px) {
  .desktop-nav, .nav-contact { display: none; }
  .menu-toggle { display: block; }
  .mobile-menu { position: fixed; z-index: 100; display: flex; flex-direction: column; top: 0; right: 0; bottom: 0; width: min(84vw, 345px); padding: 20px; color: var(--ink); background: white; box-shadow: -18px 0 42px rgba(0,0,0,.2); transform: translateX(105%); transition: transform .28s ease; }
  .mobile-menu.is-open { transform: none; }
  .mobile-menu-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 31px; padding-bottom: 15px; border-bottom: 1px solid #e8ebea; font-weight: 800; }
  /* 关闭按钮按 44px 触控下限来，原先 34px 在手机上很难点准 */
  .menu-close { width: 44px; height: 44px; margin: -5px -5px -5px 0; border: 0; border-radius: 11px; color: #46535e; background: #f3f5f4; font-size: 1.625rem; line-height: 1; cursor: pointer; }
  .mobile-menu > a { padding: 14px 7px; color: #44515d; border-bottom: 1px solid #eef0ef; font-size: var(--type-body); font-weight: 700; text-decoration: none; }
  .mobile-menu .mobile-menu-cta { display: flex; align-items: center; justify-content: space-between; margin-top: 22px; padding: 14px 16px; color: white; border: 0; border-radius: 10px; background: var(--orange); }
  .menu-backdrop { position: fixed; z-index: 90; display: block; inset: 0; background: rgba(3,9,17,.54); opacity: 0; transition: opacity .25s ease; }
  .menu-backdrop[hidden] { display: none; }
  .menu-backdrop.is-open { opacity: 1; }
}

@media (max-width: 780px) {
  .shell { width: min(100% - 34px, 620px); }.section { padding: 84px 0; }html { scroll-padding-top: 72px; }.nav-shell { height: 72px; }.brand { gap: 11px; }.brand-mark { height: 38px; border-radius: 12px; }.desktop-nav, .nav-contact { display: none; }.menu-toggle { display: block; }.mobile-menu { position: fixed; z-index: 100; display: flex; flex-direction: column; top: 0; right: 0; bottom: 0; width: min(84vw, 345px); padding: 20px; color: var(--ink); background: white; box-shadow: -18px 0 42px rgba(0,0,0,.2); transform: translateX(105%); transition: transform .28s ease; }.mobile-menu.is-open { transform: none; }.mobile-menu-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 31px; padding-bottom: 15px; border-bottom: 1px solid #e8ebea; font-weight: 800; }.menu-close { width: 44px; height: 44px; margin: -5px -5px -5px 0; border: 0; border-radius: 11px; color: #46535e; background: #f3f5f4; font-size: 1.625rem; line-height: 1; cursor: pointer; }.mobile-menu > a { padding: 14px 7px; color: #44515d; border-bottom: 1px solid #eef0ef; font-size: var(--type-body); font-weight: 700; text-decoration: none; }.mobile-menu .mobile-menu-cta { display: flex; align-items: center; justify-content: space-between; margin-top: 22px; padding: 14px 16px; color: white; border: 0; border-radius: 10px; background: var(--orange); }.menu-backdrop { position: fixed; z-index: 90; inset: 0; background: rgba(3,9,17,.54); opacity: 0; transition: opacity .25s ease; }.menu-backdrop.is-open { opacity: 1; }
  .menu-backdrop { display: block; }
  .menu-backdrop[hidden] { display: none; }
  .hero { min-height: auto; padding: calc(var(--section-pad) + 58px) 0 72px; }.hero-layout { grid-template-columns: 1fr; gap: 33px; }.hero h1 { max-width: 530px; }.hero-summary { max-width: 525px; }.hero-visual { width: min(100%, 580px); min-height: 496px; margin-inline: auto; }.graph-node { width: 158px; }.node-live, .node-knowledge { top: 3%; }.node-model, .node-geo { bottom: 6%; }.visual-caption { left: 5px; bottom: 8px; }.value-strip-grid { grid-template-columns: 1fr 1fr; }.value-strip-grid > :first-child { grid-column: span 2; padding: 20px 0 6px; }.value-strip-grid > * { padding: 14px 10px; }.value-strip-grid > :nth-child(2) { border-left: 0; padding-left: 0; }.about { padding: calc(var(--section-pad) - 4px) 0; }.about-layout { grid-template-columns: 1fr; gap: 30px; }.about-heading { padding-top: 0; }.about-heading h2 { max-width: 550px; }.about-content { padding: 25px 0 0; border-top: 1px solid #d8e1df; border-left: 0; }.about-content p { max-width: 570px; }.about-statement { max-width: 470px; min-height: 215px; }.about-statement p { margin-top: 32px; }.split-heading, .product-heading { grid-template-columns: 1fr; gap: 20px; margin-bottom: 41px; }.section-heading > p { max-width: 530px; margin-bottom: 0; }.capability-grid { gap: 12px; }.product-panel { grid-template-columns: 1fr; gap: 36px; }.product-copy { padding-left: 0; }.product-media { width: calc(100% - 16px); margin: 0 auto 25px; }.product-panel[hidden] { display: none; }.flow-steps { grid-template-columns: 1fr; gap: 20px; padding: 32px 27px; }.flow-steps::before { top: 50px; bottom: 50px; left: 51px; right: auto; width: 1px; height: auto; background: linear-gradient(rgba(167,146,255,.15), rgba(53,215,189,.78), rgba(249,115,22,.35)); }.flow-steps li { grid-template-columns: 52px 1fr; column-gap: 15px; align-items: center; justify-items: start; text-align: left; }.step-count { top: 0; left: -2px; }.step-icon { grid-column: 1; grid-row: span 2; }.flow-steps li strong { margin: 0; }.flow-steps li small { max-width: unset; margin: 0; }.board-footer { align-items: flex-start; justify-content: flex-start; }.board-head { gap: 12px; }.board-head small { display: none; }.geo-layout { grid-template-columns: 1fr; gap: 40px; }.geo-map { min-height: 420px; }.geo-scenarios { grid-template-columns: 1fr; gap: 0; margin-top: 35px; }.delivery-timeline { grid-template-columns: 1fr 1fr; row-gap: 36px; }.delivery-step:nth-child(2) .delivery-line { display: none; }.delivery-step:nth-child(3) .delivery-line { display: block; }.contact { padding: var(--section-pad) 0; }.contact-layout { grid-template-columns: 1fr; gap: 35px; }.contact-card { padding: 22px; }.footer-top, .footer-bottom { flex-direction: column; align-items: flex-start; }.footer-top { gap: 22px; }.footer-bottom { gap: 5px; }
}

@media (max-width: 500px) {
  :root { --type-heading-section: clamp(1.75rem, 7vw, 2.125rem); }.shell { width: calc(100% - 30px); }.brand { gap: 10px; }.nav-shell { gap: 16px; }.brand-copy strong { font-size: .875rem; }.hero { padding-top: calc(var(--section-pad) + 44px); }.hero h1 { font-size: clamp(2.5rem, 12vw, 3.4375rem); letter-spacing: var(--track-display); }.hero-summary { margin-top: 22px; line-height: 1.8; }.hero-actions { display: grid; grid-template-columns: 1fr; }.button { width: 100%; }.hero-footnote { margin-top: 23px; }.hero-visual { min-height: 452px; margin-bottom: 0; }.graph-node { width: 140px; gap: 7px; padding: 8px 9px; }.node-icon { width: 26px; height: 26px; }.node-icon svg { width: 15px; height: 15px; }.node-text strong { font-size: .8125rem; }.node-text small { font-size: .6875rem; letter-spacing: .05em; }.graph-core-dot { width: 54px; height: 54px; }.graph-core-dot svg { width: 22px; height: 22px; }.graph-ring { display: none; }.node-model, .node-geo { bottom: 9%; }.value-strip-grid { display: block; padding: 10px 0; }.value-strip-grid > * { padding: 10px 0; border: 0; }.value-strip-grid > :first-child { display: block; padding-top: 8px; font-size: var(--type-body); }.about { padding: calc(var(--section-pad) - 12px) 0; }.about-content { padding-top: 21px; }.about-pillars { margin-top: 22px; }.about-statement { min-height: 202px; padding: 19px; }.about-statement p { margin: 27px 0 17px; }.capability-grid { grid-template-columns: 1fr; }.capability-card { min-height: auto; }.capability-icon { margin-top: 30px; }.product-switcher { gap: 4px; padding: 4px; }.product-tab { gap: 8px; padding: 11px 8px; }.tab-number { display: none; }.tab-copy strong { font-size: var(--type-ui); }.tab-copy small { font-size: var(--type-micro); }.tab-arrow { display: none; }.media-annotation { font-size: .75rem; letter-spacing: .08em; }.annotation-top { top: -15px; }.annotation-bottom { bottom: -17px; }.window-top p { overflow: hidden; max-width: 230px; text-overflow: ellipsis; white-space: nowrap; }.intelligence-board { margin-inline: -2px; }.board-footer { gap: 10px; }.to-top { width: 48px; height: 48px; right: 14px; bottom: 14px; }.to-top-arrow { font-size: 1.125rem; }.geo-map { min-height: 380px; }.map-ring.ring-a { width: 280px; height: 280px; top: 60px; left: calc(50% - 140px); }.map-ring.ring-b { width: 155px; height: 155px; top: 122px; left: calc(50% - 77px); }.map-location { top: 169px; left: calc(50% - 33px); }.route-a { width: 188px; left: 42px; top: 187px; }.route-b { width: 135px; top: 211px; left: calc(50% + 20px); }.map-card { min-width: 112px; padding: 8px; }.map-card-journey { top: 65px; right: 18px; }.map-card-local { bottom: 49px; left: 17px; }.label-a { right: 21px; top: 141px; }.label-b { left: 25px; top: 270px; }.label-c { bottom: 92px; right: 150px; }.delivery-timeline { grid-template-columns: 1fr; gap: 28px; }.delivery-step, .delivery-step:nth-child(2), .delivery-step:nth-child(3) { padding-right: 0; }.delivery-step .delivery-line { display: block !important; top: 48px; left: 24px; bottom: -28px; right: auto; width: 1px; height: auto; }.delivery-step:last-child .delivery-line { display: none !important; }.delivery-content { margin: 15px 0 0 63px; margin-top: -38px; min-height: 62px; }.footer-links { gap: 14px 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }.pulse-dot { animation: none; }.reveal { opacity: 1; transform: none; transition: none; } * { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

@media print {
  .site-header, .nav-sentinel, .mobile-menu, .menu-backdrop, .hero-visual, .value-strip, .geo-map, .pulse-dot, .visual-caption, .media-annotation, .footer-links, .to-top { display: none !important; }
  body { background: white; color: #111; }
  .section, .about, .capabilities, .products, .geo, .delivery { padding: 22px 0 !important; }
  .section-dark, .model-path, .contact, .about-statement, .board-head, .board-footer { background: white !important; background-image: none !important; color: #111 !important; box-shadow: none !important; }
  .section-dark *, .about-statement *, .board-head *, .board-footer * { color: #111 !important; border-color: #ccc !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .image-wrap { max-height: none !important; mask-image: none !important; -webkit-mask-image: none !important; }
  a { color: #111 !important; text-decoration: underline; }
  .site-footer { border-top: 1px solid #ccc; }
}