/* OAIR-NEXT 宣传页 · 纯静态，配色取自 App 的 Brand（暖橙主色 + 深陶土强调）
   版式规则：所有块共用 .wrap 的左右边线；每节 = 标题区 .head + 一个展台 .stage；展台里的卡片统一用 .card。 */

:root {
  --bg: #FAF8F5;
  --surface: #FFFFFF;
  --ink: #1C1714;
  --ink-2: #4A413B;
  --muted: #857971;
  --line: #ECE4DB;
  --line-2: #DCD0C4;
  --accent: #D97757;
  --deep: #AE5630;
  --sand: #F0B287;
  --ok: #5B8A6E;
  --warn: #BF8A3A;
  --red: #B5473A;
  --on-accent: #FFFFFF;
  --glass: rgba(255, 255, 255, .74);
  --glass-line: rgba(255, 255, 255, .95);
  --card-shadow: 0 1px 2px rgba(60, 35, 20, .04), 0 8px 24px -12px rgba(120, 60, 30, .14);
  --lift: 0 2px 4px rgba(60, 35, 20, .04), 0 24px 60px -20px rgba(120, 60, 30, .28);
  --stage-a: #F7EDE5;
  --stage-b: #FBE1CF;
  --stage-c: #F9F1EA;
  --hero-a: #FBE3D2;
  --hero-b: #F6C3A4;
  --hero-c: #FAEEE4;
  --night: #17110E;
  /* 重点区块（能力上限、宣言、收尾）：跟随深浅色，不在浅色页里插黑块 */
  --b-solid: #FBF2EA;
  --b-bg: radial-gradient(60% 60% at 85% 0%, rgba(217, 119, 87, .24), transparent 70%), radial-gradient(50% 60% at 0% 100%, rgba(240, 178, 135, .32), transparent 70%), #FBF2EA;
  --b-rgb: 28, 23, 20;
  --b-fill: 140, 80, 45;
  --b-cell: #FFFAF6;
  --b-acc: #C2603A;
  --b-grad: linear-gradient(100deg, #D97757, #AE5630);
  --b-num: linear-gradient(180deg, #1C1714 25%, #AE5630);
  --b-f3: #AE5630;
  --b-f1: #CF7350;
  --b-viz: rgba(140, 80, 45, .06);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12100E;
    --surface: #1E1916;
    --ink: #F5EFE9;
    --ink-2: #D3C8BF;
    --muted: #9C8F86;
    --line: #2C2521;
    --line-2: #3D342E;
    --accent: #E88C6C;
    --deep: #F0A480;
    --ok: #80BA96;
    --warn: #E2AE5C;
    --red: #E87868;
    --on-accent: #1A1310;
    --glass: rgba(38, 31, 27, .7);
    --glass-line: rgba(255, 255, 255, .07);
    --card-shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 10px 30px -14px rgba(0, 0, 0, .7);
    --lift: 0 2px 4px rgba(0, 0, 0, .3), 0 28px 64px -24px rgba(0, 0, 0, .8);
    --stage-a: #1A1512;
    --stage-b: #3A2216;
    --stage-c: #181310;
    --hero-a: #3A2418;
    --hero-b: #5E321D;
    --hero-c: #221914;
    --night: #0C0907;
    --b-solid: #17110E;
    --b-bg: radial-gradient(60% 60% at 85% 0%, rgba(217, 119, 87, .38), transparent 70%), radial-gradient(50% 60% at 0% 100%, rgba(174, 86, 48, .3), transparent 70%), #17110E;
    --b-rgb: 247, 239, 232;
    --b-fill: 255, 255, 255;
    --b-cell: #1B1411;
    --b-acc: #F4A884;
    --b-grad: linear-gradient(100deg, #F4A884, #E88C6C 60%, #F0B287);
    --b-num: linear-gradient(180deg, #FFF4EC 20%, #F0A480);
    --b-f3: #F6E3D6;
    --b-f1: #F0B287;
    --b-viz: rgba(0, 0, 0, .25);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--font); font-size: 17px; line-height: 1.8;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
  text-spacing-trim: space-first;
}
a { color: inherit; text-decoration: none; }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
svg:has(> use), symbol, .sprite { fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.wrap { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- 字标 ---------- */
.logo { display: inline-flex; align-items: baseline; line-height: 1; white-space: nowrap; font-weight: 800; letter-spacing: .04em; }
.logo-a { color: var(--ink); }
.logo-dash { color: var(--muted); font-weight: 600; margin: 0 .08em; }
.logo-b {
  background: linear-gradient(110deg, var(--accent), var(--deep));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(18px); backdrop-filter: saturate(1.4) blur(18px);
  border-bottom: 1px solid transparent; transition: border-color .3s;
}
.topbar.scrolled { border-bottom-color: var(--line); }
.topbar-in { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.topbar .logo { font-size: 20px; }
.topbar-links { display: flex; align-items: center; gap: 28px; font-size: 14px; color: var(--muted); }
.topbar-links a:hover { color: var(--ink); }
.topbar-links .nav-cta { color: var(--bg); background: var(--ink); padding: 6px 14px; border-radius: 999px; font-weight: 600; }
.topbar-links .nav-cta:hover { color: var(--bg); opacity: .88; }
.topbar-links .nav-system { display: inline-flex; align-items: center; min-height: 40px; white-space: nowrap; color: var(--ink); background: transparent; border: 1px solid var(--line); }
.topbar-links .nav-system:hover { color: var(--ink); border-color: var(--accent); opacity: 1; }
.topbar-links .nav-system:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ---------- 首屏 ---------- */
.hero { text-align: center; padding-top: 96px; padding-bottom: 8px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px; margin: 0 0 30px;
  font-size: 13.5px; font-weight: 600; color: var(--deep);
  padding: 6px 14px 6px 12px; border-radius: 999px;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--accent) 28%, transparent);
}
.badge i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 0 var(--accent); animation: ping 2s ease-out infinite; }
@keyframes ping { 70% { box-shadow: 0 0 0 8px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }
.hero-title {
  margin: 0; font-weight: 800; line-height: 1.08; letter-spacing: -.01em;
  font-size: clamp(50px, 8.6vw, 112px);
}
.hero-title em, h2 em, .st-big em {
  font-style: normal;
  background: linear-gradient(100deg, var(--accent) 10%, var(--deep) 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-lead { font-size: clamp(18px, 2.1vw, 22px); color: var(--ink-2); margin: 30px auto 0; line-height: 1.75; max-width: 760px; text-wrap: balance; }
.hero-lead b { color: var(--ink); }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 36px; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 13px 24px; border-radius: 999px; font-size: 15.5px; font-weight: 600;
  background: var(--ink); color: var(--bg); transition: transform .2s, opacity .2s;
}
.btn svg { width: 16px; height: 16px; stroke-width: 2; }
.btn:hover { transform: translateY(-1px); opacity: .9; }
.btn.ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 1px var(--line-2); }

/* ---------- 展台与卡片 ---------- */
.stage {
  position: relative; margin: 48px 0 0; border-radius: 32px; overflow: hidden;
  padding: clamp(20px, 4.4vw, 56px);
  background:
    radial-gradient(55% 70% at 8% 0%, var(--stage-b), transparent 70%),
    radial-gradient(45% 60% at 100% 100%, var(--stage-b), transparent 70%),
    linear-gradient(160deg, var(--stage-a), var(--stage-c));
}
.stage-note { text-align: center; font-size: 12.5px; color: var(--muted); margin: 18px 0 0; }
.card {
  background: var(--surface); border: 1px solid var(--line); border-radius: 20px;
  box-shadow: var(--card-shadow);
}
.glass {
  background: var(--glass); border: 1px solid var(--glass-line);
  -webkit-backdrop-filter: blur(22px) saturate(1.5); backdrop-filter: blur(22px) saturate(1.5);
  box-shadow: var(--lift);
}

.mc-head { display: flex; align-items: center; gap: 8px; }
.mc-meta { font-size: 12px; color: var(--muted); }
.chip { font-size: 12px; font-weight: 600; padding: 2px 10px; border-radius: 999px; line-height: 1.6; }
.chip.warn { color: var(--warn); background: color-mix(in srgb, var(--warn) 16%, transparent); }


/* ---------- 小节 ---------- */
.sec { padding-top: 150px; scroll-margin-top: 30px; }
.head { max-width: 780px; }
.kicker { font-size: 14px; font-weight: 700; color: var(--deep); margin: 0 0 16px; letter-spacing: .06em; }
h2 { font-size: clamp(32px, 4.8vw, 54px); line-height: 1.24; letter-spacing: -.005em; font-weight: 800; margin: 0 0 24px; text-wrap: balance; }
h2 span { color: var(--muted); font-weight: 700; }
.body { color: var(--ink-2); margin: 0; font-size: 18px; line-height: 1.85; max-width: 700px; text-wrap: pretty; }
.fig { margin: 0; }
.fig svg { width: 100%; height: auto; display: block; overflow: visible; }

/* 前后对比 */
.compare { display: grid; grid-template-columns: minmax(0, 1fr) 56px minmax(0, 1fr); align-items: center; gap: 12px; }
.cmp { padding: 26px 26px 22px; }
.cmp-h { margin: 0 0 14px; font-size: 14px; font-weight: 700; letter-spacing: .06em; }
.cmp ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.cmp li { font-size: 15.5px; line-height: 1.55; display: flex; gap: 10px; align-items: flex-start; }
.cmp.before { background: transparent; box-shadow: none; border-style: dashed; border-color: var(--line-2); }
.cmp.before .cmp-h { color: var(--muted); }
.cmp.before li { color: var(--muted); }
.cmp.before li::before { content: ""; flex: none; width: 14px; height: 2px; margin-top: .75em; background: var(--line-2); border-radius: 1px; }
.cmp.after { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); box-shadow: var(--lift); }
.cmp.after .cmp-h { color: var(--deep); }
.cmp.after li { font-weight: 550; }
.cmp.after li svg { flex: none; width: 18px; height: 18px; margin-top: .15em; color: var(--accent); stroke-width: 2.4; }
.cmp-arrow { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 50%; background: var(--accent); color: var(--on-accent); justify-self: center; box-shadow: 0 10px 24px -8px var(--accent); }
.cmp-arrow svg { width: 22px; height: 22px; stroke-width: 2.2; }

/* 十二职务 */
.roles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.role { display: flex; flex-direction: column; padding: 20px 18px 18px; transition: transform .25s, box-shadow .25s; }
.role:hover { transform: translateY(-3px); box-shadow: var(--lift); }
.role svg { width: 28px; height: 28px; color: var(--accent); margin-bottom: 16px; }
.role b { font-size: 16px; font-weight: 700; line-height: 1.4; }
.role span { font-size: 13.5px; color: var(--muted); line-height: 1.55; margin-top: 4px; }
.role.lead { background: linear-gradient(150deg, var(--accent), var(--deep)); border-color: transparent; color: var(--on-accent); }
.role.lead svg { color: var(--on-accent); }
.role.lead span { color: var(--on-accent); opacity: .82; }

/* 宣言 */
.statement, .closing {
  margin-top: 150px; border-radius: 32px; text-align: center; color: rgb(var(--b-rgb)); overflow: hidden; position: relative;
  padding: clamp(80px, 11vw, 140px) 24px;
  background:
    radial-gradient(50% 70% at 50% 120%, rgba(217, 119, 87, .4), transparent 70%),
    var(--b-bg);
}
.statement em, .closing h2 em { background: var(--b-grad); -webkit-background-clip: text; background-clip: text; color: transparent; font-style: normal; }
.st-small { margin: 0 0 22px; font-size: 15px; color: rgba(var(--b-rgb), .6); letter-spacing: .04em; }
.st-big { margin: 0; font-size: clamp(30px, 5.2vw, 60px); line-height: 1.3; font-weight: 800; text-wrap: balance; }

/* 老板首页 */
.boss-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px minmax(0, 1fr); gap: 40px; align-items: center; }
.callouts { display: grid; gap: 18px; }
.callouts.left { text-align: right; }
.callout { display: flex; flex-direction: column; padding: 18px 20px; border-radius: 20px; background: var(--glass); border: 1px solid var(--glass-line); -webkit-backdrop-filter: blur(16px); backdrop-filter: blur(16px); box-shadow: var(--card-shadow); }
.callout b { font-size: 17px; font-weight: 700; color: var(--ink); }
.callout span { font-size: 14px; color: var(--muted); margin-top: 2px; line-height: 1.55; }
.phone {
  width: 300px; justify-self: center; padding: 10px; border-radius: 48px;
  background: linear-gradient(160deg, #3A332E, #1A1614);
  box-shadow: 0 40px 80px -30px rgba(80,40,20,.55), inset 0 0 0 1.5px rgba(255,255,255,.12);
}
.phone-screen {
  position: relative; overflow: hidden; border-radius: 39px; min-height: 560px; padding: 14px 14px 20px;
  background:
    radial-gradient(70% 45% at 20% 0%, var(--hero-b), transparent 70%),
    radial-gradient(60% 40% at 100% 100%, var(--hero-a), transparent 70%),
    var(--hero-c);
}
.ph-status { display: flex; justify-content: space-between; align-items: center; font-size: 13px; font-weight: 600; padding: 2px 10px 0; height: 30px; }
.ph-isl { width: 84px; height: 24px; border-radius: 14px; background: #000; }
.ph-bat { width: 24px; height: 11px; border-radius: 3px; border: 1.5px solid var(--ink); opacity: .7; }
.ph-hello { font-size: 28px; font-weight: 800; margin: 20px 6px 0; line-height: 1.3; }
.ph-sub { font-size: 13px; color: var(--muted); margin: 0 6px 14px; }
.ph-sub b { color: var(--deep); }
.ph-card { border-radius: 24px; padding: 16px; }
.ph-title { font-size: 16px; font-weight: 700; line-height: 1.45; margin: 10px 0 4px; }
.ph-why { font-size: 12.5px; color: var(--muted); margin: 0 0 12px; line-height: 1.5; }
.ph-opts { list-style: none; padding: 0; margin: 0; display: grid; gap: 7px; }
.ph-opts li { display: flex; align-items: center; gap: 8px; font-size: 13px; padding: 9px 11px; border-radius: 13px; background: color-mix(in srgb, var(--surface) 70%, transparent); border: 1px solid var(--line); line-height: 1.35; }
.ph-opts li span { color: var(--deep); font-weight: 700; }
.ph-opts li em { font-style: normal; margin-left: auto; font-size: 11px; font-weight: 700; color: var(--accent); }
.ph-opts li.own { background: transparent; border-style: dashed; color: var(--muted); }
.ph-opts li.pick { animation: pick 6s ease-in-out infinite; }
@keyframes pick {
  0%, 25%, 100% { background: color-mix(in srgb, var(--surface) 70%, transparent); border-color: var(--line); transform: none; }
  33% { transform: scale(.97); }
  40%, 85% { background: color-mix(in srgb, var(--accent) 18%, transparent); border-color: var(--accent); transform: none; }
}
.ph-toast {
  position: absolute; left: 50%; bottom: 22px; translate: -50% 0;
  display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
  font-size: 13px; font-weight: 600; padding: 9px 16px; border-radius: 999px;
  background: var(--ink); color: var(--bg); animation: toast 6s ease-in-out infinite; opacity: 0;
}
.ph-toast svg { width: 15px; height: 15px; }
@keyframes toast { 0%, 40% { opacity: 0; transform: translateY(10px); } 48%, 85% { opacity: 1; transform: none; } 95%, 100% { opacity: 0; } }

/* 小组件 */
.widgets { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; padding: 12px 0; }
.widget { border-radius: 26px; padding: 18px 20px; }
.widget.wide { width: 340px; max-width: 100%; }
.widget.small { width: 160px; }
.w-h { font-size: 13px; font-weight: 700; color: var(--deep); margin: 0 0 10px; }
.w-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.w-list li { display: flex; align-items: center; gap: 9px; font-size: 14px; line-height: 1.35; }
.w-list em { font-style: normal; margin-left: auto; font-size: 12px; color: var(--muted); }
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; flex: none; background: var(--muted); }
.dot.red { background: var(--red); } .dot.warn { background: var(--warn); } .dot.ok { background: var(--ok); }
.w-big { font-size: 56px; font-weight: 800; line-height: 1; margin: 6px 0 12px; letter-spacing: -.03em; }
.w-foot { font-size: 12px; color: var(--muted); margin: 0; display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }

/* 打勾纠错 */
.check-demo { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 18px; align-items: center; }
.answer { padding: 22px; }
.ans-h { display: flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; color: var(--deep); margin: 0 0 10px; }
.ans-h svg { width: 18px; height: 18px; }
.seg { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 4px 12px; align-items: start; padding: 12px 0; border-top: 1px solid var(--line); }
.seg p { margin: 0; font-size: 15.5px; line-height: 1.6; }
.seg s { color: var(--muted); text-decoration-color: var(--red); }
.mark { width: 30px; height: 30px; border-radius: 10px; display: grid; place-items: center; }
.mark svg { width: 17px; height: 17px; stroke-width: 2.2; }
.mark.ok { color: var(--ok); background: color-mix(in srgb, var(--ok) 15%, transparent); }
.mark.edit { color: var(--red); background: color-mix(in srgb, var(--red) 14%, transparent); }
.seg .fixnote { grid-column: 1 / -1; font-size: 14px; color: var(--red); padding: 8px 12px; border-radius: 10px; background: color-mix(in srgb, var(--red) 8%, transparent); animation: writein 7s ease-in-out infinite; }
@keyframes writein { 0%, 10% { clip-path: inset(0 100% 0 0); } 40%, 100% { clip-path: inset(0 0 0 0); } }
.lesson { display: flex; align-items: center; gap: 10px; }
.lesson-arrow { width: 56px; flex: none; fill: none; stroke: var(--accent); stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; stroke-dasharray: 6 6; animation: flow 1.2s linear infinite reverse; }
.lesson-card { border-radius: 20px; padding: 18px 20px; background: linear-gradient(150deg, var(--accent), var(--deep)); color: var(--on-accent); box-shadow: var(--lift); }
.lesson-h { display: flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 700; margin: 0 0 6px; opacity: .9; }
.lesson-h svg { width: 16px; height: 16px; }
.lesson-t { font-size: 17px; font-weight: 800; margin: 0 0 6px; line-height: 1.45; }
.lesson-f { font-size: 12.5px; margin: 0; opacity: .85; line-height: 1.5; }

/* 图表 */
.chart-card { margin: 0 auto; max-width: 760px; padding: 24px 24px 18px; }
.chart-t { font-size: 15px; font-weight: 700; margin: 0 0 8px; }
.chart { width: 100%; height: auto; display: block; }
.chart .grid line { stroke: var(--line); stroke-width: 1; }
.chart .grid line:first-child { stroke: var(--line-2); }
.chart .axis text { fill: var(--muted); font-size: 13px; text-anchor: end; font-family: var(--font); }
.chart .xlab text { fill: var(--muted); font-size: 13px; text-anchor: middle; font-family: var(--font); }
.chart .bars path { fill: var(--sand); transition: fill .2s; }
.chart .bars path.last { fill: var(--accent); }
.chart .bars path:hover { fill: var(--deep); }
.chart .val { fill: var(--ink); font-size: 14px; font-weight: 700; text-anchor: middle; font-family: var(--font); }
.source { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); margin-top: 10px; padding-top: 12px; border-top: 1px dashed var(--line-2); }
.source svg { width: 15px; height: 15px; color: var(--accent); flex: none; }

/* 三端 */
.devices .win { fill: var(--surface); stroke: var(--line-2); stroke-width: 1.2; filter: drop-shadow(0 18px 30px rgba(90,45,20,.14)); }
.devices .win-side, .devices .win-side-fix { fill: color-mix(in srgb, var(--line) 50%, var(--surface)); }
.devices .tl.r { fill: #E8695E; } .devices .tl.y { fill: #E6B54A; } .devices .tl.g { fill: #6CB86A; }
.devices .sk { fill: var(--line); }
.devices .sk.strong { fill: var(--ink); opacity: .75; }
.devices .sk.sel { fill: color-mix(in srgb, var(--accent) 22%, transparent); }
.devices .lane { fill: color-mix(in srgb, var(--line) 50%, var(--surface)); stroke: var(--line); }
.devices .lane.hot { fill: color-mix(in srgb, var(--accent) 18%, var(--surface)); stroke: var(--accent); animation: lane 3s ease-in-out infinite; }
.devices .lanes .lane:nth-child(5) { animation-delay: 1.5s; }
@keyframes lane { 50% { fill-opacity: .4; } }
.devices .pulse-line { fill: none; stroke: var(--accent); stroke-width: 2.5; stroke-linejoin: round; stroke-linecap: round; stroke-dasharray: 520; animation: draw 4s ease-in-out infinite; }
@keyframes draw { 0% { stroke-dashoffset: 520; } 60%, 100% { stroke-dashoffset: 0; } }
.devices .bar, .devices .bar-fix { fill: color-mix(in srgb, var(--line) 50%, var(--surface)); }
.devices .url { fill: var(--surface); stroke: var(--line); }
.devices .card-a { fill: color-mix(in srgb, var(--line) 50%, var(--surface)); }
.devices .card-b { fill: color-mix(in srgb, var(--accent) 10%, var(--surface)); stroke: color-mix(in srgb, var(--accent) 30%, transparent); }
.devices .mini-bars { stroke: var(--accent); stroke-width: 12; stroke-linecap: round; opacity: .8; }
.devices .ios .body { fill: #241E1A; filter: drop-shadow(0 24px 30px rgba(60,30,15,.3)); }
.devices .ios .screen { fill: var(--hero-c); }
.devices .ios .island { fill: #000; }
.devices .glass-card { fill: var(--glass); stroke: var(--glass-line); }
.devices .chip-s { fill: var(--warn); opacity: .3; }
.devices .opt-s { fill: none; stroke: var(--line-2); }
.devices .opt-s.pick { fill: color-mix(in srgb, var(--accent) 22%, transparent); stroke: var(--accent); }
.devices .tabbar { fill: var(--glass); stroke: var(--line-2); }
.dev-labels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 28px; text-align: center; }
.dev-labels b { display: block; font-size: 16px; font-weight: 700; }
.dev-labels span { font-size: 13.5px; color: var(--muted); }

/* 分隔 */
.divider { display: flex; align-items: center; gap: 18px; margin: 160px 0 -50px; color: var(--deep); font-size: 14px; font-weight: 700; letter-spacing: .12em; }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, transparent, var(--line-2), transparent); }

/* 记忆 */
.fig .memory { max-width: 560px; margin: 0 auto; }
.memory .model rect { fill: var(--surface); stroke: var(--line-2); stroke-width: 1.4; }
.memory .model text { fill: var(--ink); font-size: 22px; font-weight: 700; text-anchor: middle; font-family: var(--font); }
.memory .m1, .memory .l1 { animation: on3a 9s ease-in-out infinite; }
.memory .m2, .memory .l2 { animation: on3b 9s ease-in-out infinite; }
.memory .m3, .memory .l3 { animation: on3c 9s ease-in-out infinite; }
@keyframes on3a { 0%, 30% { opacity: 1; } 36%, 94% { opacity: .32; } 100% { opacity: 1; } }
@keyframes on3b { 0%, 30% { opacity: .32; } 36%, 63% { opacity: 1; } 69%, 100% { opacity: .32; } }
@keyframes on3c { 0%, 63% { opacity: .32; } 69%, 94% { opacity: 1; } 100% { opacity: .32; } }
@keyframes active1 { 0%, 45% { opacity: 1; } 55%, 95% { opacity: .38; } 100% { opacity: 1; } }
@keyframes active2 { 0%, 45% { opacity: .38; } 55%, 95% { opacity: 1; } 100% { opacity: .38; } }
.memory .link { fill: none; stroke: var(--accent); stroke-width: 2.5; stroke-linecap: round; }
.memory .plug { fill: var(--accent); }
.memory .layer { stroke: var(--stage-a); stroke-width: 2; }
.memory .y1 { fill: var(--deep); } .memory .y2 { fill: var(--accent); }
.memory .y3 { fill: color-mix(in srgb, var(--accent) 40%, var(--surface)); } .memory .y4 { fill: color-mix(in srgb, var(--accent) 22%, var(--surface)); }
.memory .stack text { fill: var(--on-accent); font-size: 19px; font-weight: 700; text-anchor: middle; font-family: var(--font); }
.memory .stack text:nth-of-type(3), .memory .stack text:nth-of-type(4) { fill: var(--ink); }

/* 多模型 */
.model-demo { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.mcard { padding: 24px; }
.mcard-h { font-size: 13px; font-weight: 700; color: var(--deep); margin: 0 0 16px; }
.mcard-f { display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--muted); margin: 16px 0 0; }
.seg-ctl { position: relative; display: grid; grid-template-columns: 1fr 1fr; padding: 4px; border-radius: 14px; background: color-mix(in srgb, var(--line) 60%, var(--surface)); }
.seg-ctl .thumb { position: absolute; top: 4px; bottom: 4px; left: 4px; width: calc(50% - 4px); border-radius: 10px; background: var(--surface); box-shadow: 0 2px 8px rgba(80,40,20,.16); animation: slide 8s ease-in-out infinite; }
@keyframes slide { 0%, 45% { transform: translateX(0); } 55%, 95% { transform: translateX(100%); } 100% { transform: translateX(0); } }
.seg-ctl .opt { position: relative; text-align: center; font-size: 15px; font-weight: 700; padding: 8px 0; }
.seg-ctl .a { animation: active1 8s ease-in-out infinite; }
.seg-ctl .b { animation: active2 8s ease-in-out infinite; }
.upl { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border-radius: 14px; border: 1px dashed var(--line-2); font-size: 14px; }
.upl svg { width: 22px; height: 22px; color: var(--accent); flex: none; }
.upl-row { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; font-size: 14px; color: var(--muted); padding: 10px 14px; border-radius: 12px; background: color-mix(in srgb, var(--line) 50%, var(--surface)); }
.upl-row b { color: var(--deep); font-weight: 700; }

/* 主备时间线 */
.failover .lane-l { fill: var(--ink); font-size: 20px; font-weight: 700; font-family: var(--font); }
.failover .run { fill: none; stroke-width: 14; stroke-linecap: round; }
.failover .run.mac { stroke: var(--accent); }
.failover .run.cloud { stroke: var(--deep); }
.failover .down { fill: none; stroke: var(--red); stroke-width: 3; stroke-dasharray: 3 9; stroke-linecap: round; opacity: .8; }
.failover .idle { fill: none; stroke: var(--line-2); stroke-width: 3; stroke-dasharray: 10 8; stroke-linecap: round; }
.failover .ev { fill: var(--surface); stroke: var(--muted); stroke-width: 3; }
.failover .ev.bad { stroke: var(--red); }
.failover .ev.good { stroke: var(--ok); }
.failover .ann text { fill: var(--ink-2); font-size: 17px; text-anchor: middle; font-family: var(--font); }
.failover .span { fill: none; stroke: var(--muted); stroke-width: 1.5; }
.failover .ann .span-t { fill: var(--deep); font-weight: 700; }
.failover .st { fill: var(--muted); font-size: 15px; text-anchor: middle; font-family: var(--font); }
.failover .sweep { stroke: var(--accent); stroke-width: 1.5; stroke-dasharray: 3 5; opacity: .6; animation: sweep 9s linear infinite; }
@keyframes sweep { from { transform: translateX(0); } to { transform: translateX(820px); } }
.fig .failover-m { display: none; }
.failover-m .ann text { font-size: 14px; }
.failover-m .lane-l { font-size: 16px; }
.failover-m .run { stroke-width: 10; }
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 36px; }
.trio .card { padding: 20px 22px; }
.trio b { font-size: 17px; font-weight: 700; }
.trio p { margin: 4px 0 0; font-size: 14px; color: var(--muted); line-height: 1.65; }

/* 自恢复 */
.drills { margin: 0; padding: 24px; }
.drills ul { list-style: none; padding: 0; margin: 12px 0 0; display: grid; gap: 16px; }
.drills li { display: grid; grid-template-columns: 80px minmax(0, 1fr) 80px; gap: 14px; align-items: center; font-size: 14.5px; }
.dl { color: var(--ink-2); }
.dv { color: var(--ink); font-weight: 700; text-align: right; font-variant-numeric: tabular-nums; }
.db { height: 12px; border-radius: 6px; background: color-mix(in srgb, var(--line) 60%, var(--surface)); overflow: hidden; }
.db i { display: block; height: 100%; border-radius: 0 6px 6px 0; background: linear-gradient(90deg, var(--accent), var(--deep)); min-width: 6px; transform-origin: left; }
.db .w5 { width: 1.4%; } .db .w15 { width: 4.2%; } .db .w50 { width: 13.9%; } .db .w360 { width: 100%; }
.reveal.in .db i { animation: grow 1.2s cubic-bezier(.2,.8,.2,1) both; }
@keyframes grow { from { transform: scaleX(0); } }

/* 细节便当格 */
.bento { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 48px; }
.cell { position: relative; overflow: hidden; padding: 24px 22px 22px; transition: transform .25s, box-shadow .25s; }
.cell:hover { transform: translateY(-3px); box-shadow: var(--lift); }
.cell > svg { width: 30px; height: 30px; color: var(--accent); }
.cell b { display: block; font-size: 18px; font-weight: 700; margin: 14px 0 6px; }
.cell b em { font-style: normal; font-size: 11.5px; font-weight: 700; color: var(--deep); padding: 1px 8px; border-radius: 999px; border: 1px solid color-mix(in srgb, var(--deep) 40%, transparent); vertical-align: 2px; margin-left: 4px; }
.cell p { margin: 0; font-size: 14.5px; color: var(--muted); line-height: 1.7; }
.lv { display: inline-block; font-size: 12px; font-weight: 700; padding: 0 8px; border-radius: 999px; margin-right: 5px; color: var(--muted); background: color-mix(in srgb, var(--line) 60%, var(--surface)); line-height: 1.8; }
.lv.red { color: var(--red); background: color-mix(in srgb, var(--red) 13%, transparent); }
.lv.warn { color: var(--warn); background: color-mix(in srgb, var(--warn) 15%, transparent); }
.seals { position: absolute; right: 18px; top: 22px; display: flex; gap: 5px; }
.seals span { width: 26px; height: 26px; display: grid; place-items: center; font-size: 13px; font-weight: 700; color: #fff; background: #B23A2E; border-radius: 5px; transform: rotate(-6deg); box-shadow: inset 0 0 0 2px rgba(255,255,255,.25); }
.seals span:nth-child(2) { transform: rotate(4deg); }
.seals span:nth-child(3) { transform: rotate(-2deg); }

/* 收尾 */
.closing { margin-bottom: 40px; }
.closing .logo-xl { justify-content: center; font-size: 22px; margin: 0 0 34px; }
.closing .logo-a { color: rgb(var(--b-rgb)); }
.closing .logo-dash { color: rgba(var(--b-rgb), .5); }
.closing h2 { color: rgb(var(--b-rgb)); font-size: clamp(32px, 5.6vw, 64px); line-height: 1.25; margin: 0 0 20px; }
.closing-sub { margin: 0 0 36px; color: rgba(var(--b-rgb), .6); font-size: 15px; letter-spacing: .04em; }
.closing .btn { background: rgb(var(--b-rgb)); color: var(--b-solid); }
.foot { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px 20px; padding-top: 28px; padding-bottom: 40px; font-size: 13px; color: var(--muted); }
.foot .logo { font-size: 16px; }

/* 三档分段开关 */
.seg-ctl.three { grid-template-columns: repeat(3, 1fr); }
.seg-ctl.three .thumb { width: calc((100% - 8px) / 3); animation: slide3 9s ease-in-out infinite; }
.seg-ctl.three .a { animation: on3a 9s ease-in-out infinite; }
.seg-ctl.three .b { animation: on3b 9s ease-in-out infinite; }
.seg-ctl.three .c { position: relative; text-align: center; font-size: 15px; font-weight: 700; padding: 8px 0; animation: on3c 9s ease-in-out infinite; }
@keyframes slide3 { 0%, 30% { transform: translateX(0); } 36%, 63% { transform: translateX(100%); } 69%, 94% { transform: translateX(200%); } 100% { transform: translateX(0); } }

/* ---------- 能力上限 ---------- */
.calc-n { background: var(--b-grad); -webkit-background-clip: text; background-clip: text; color: transparent; font-style: normal; }
.lanes { width: 100%; height: auto; display: block; overflow: hidden; }
.lane line { stroke: rgba(var(--b-fill), .12); stroke-width: 1; }
.lane rect { transform-box: view-box; animation: dash 4s linear infinite; }
.lane.f0 rect { fill: #E88C6C; } .lane.f1 rect { fill: var(--b-f1); } .lane.f2 rect { fill: #F4A884; } .lane.f3 rect { fill: var(--b-f3); }
.lane rect { filter: drop-shadow(0 0 4px rgba(232, 140, 108, .75)); }
.lane.t1 rect { animation-duration: 3.1s; } .lane.t2 rect { animation-duration: 4.3s; } .lane.t3 rect { animation-duration: 3.7s; }
.lane.t4 rect { animation-duration: 5.2s; } .lane.t5 rect { animation-duration: 2.8s; } .lane.t6 rect { animation-duration: 4.8s; }
.lane rect.o1 { animation-delay: -.2s; } .lane rect.o2 { animation-delay: -1.1s; } .lane rect.o3 { animation-delay: -2.3s; }
.lane rect.o4 { animation-delay: -.7s; } .lane rect.o5 { animation-delay: -3.4s; } .lane rect.o6 { animation-delay: -1.8s; }
@keyframes dash { from { transform: translateX(0); } to { transform: translateX(1000px); } }
.spec-grid { list-style: none; padding: 0; margin: 20px 0 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: rgba(var(--b-fill), .12); border-radius: 22px; overflow: hidden; }
.spec-grid li { background: var(--b-cell); padding: 26px 22px 24px; }
.spec-grid b {
  display: block; font-size: clamp(36px, 4.4vw, 54px); font-weight: 800; line-height: 1.05; letter-spacing: -.02em;
  background: var(--b-num); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.spec-grid small { font-size: 15px; font-weight: 600; margin-left: 4px; letter-spacing: 0; color: var(--b-acc); -webkit-text-fill-color: var(--b-acc); }
.spec-grid span { display: block; margin-top: 10px; font-size: 13.5px; line-height: 1.6; color: rgba(var(--b-rgb), .62); }
.spec-note { margin: 18px 0 0; font-size: 12.5px; color: rgba(var(--b-rgb), .45); }


/* 并发演算 */
.calc { display: grid; grid-template-columns: 360px minmax(0, 1fr); gap: 28px; align-items: stretch; margin: 0; padding: 26px; border-radius: 24px; background: rgba(var(--b-fill), .05); border: 1px solid rgba(var(--b-fill), .12); }
.calc-ctl { display: flex; flex-direction: column; gap: 18px; }
.calc-row { display: flex; flex-direction: column; gap: 8px; }
.calc-l { font-size: 13px; color: rgba(var(--b-rgb), .6); letter-spacing: .04em; }
.pills { display: flex; flex-wrap: wrap; gap: 6px; }
.pills button { font: inherit; font-size: 14px; font-weight: 600; color: rgba(var(--b-rgb), .8); background: rgba(var(--b-fill), .07); border: 1px solid rgba(var(--b-fill), .14); padding: 7px 13px; border-radius: 999px; cursor: pointer; transition: background .2s, color .2s, border-color .2s; }
.pills button:hover { background: rgba(var(--b-fill), .14); }
.pills button.on { color: var(--on-accent); background: linear-gradient(100deg, var(--accent), var(--deep)); border-color: transparent; }
.calc-out { margin-top: auto; display: flex; align-items: baseline; gap: 10px; }
.calc-n { display: inline-block; min-width: 2ch; font-size: clamp(72px, 9vw, 120px); font-weight: 800; line-height: .95; letter-spacing: -.04em; font-variant-numeric: tabular-nums; }
.calc-u { font-size: 18px; font-weight: 700; color: var(--ink); }
.calc-formula { margin: 0; font-size: 13px; color: rgba(var(--b-rgb), .5); font-variant-numeric: tabular-nums; }
.calc-viz { position: relative; display: flex; flex-direction: column; padding: 12px 14px; min-height: 280px; border-radius: 18px; background: var(--b-viz); }
.calc-viz .lanes { flex: 1; height: auto; min-height: 240px; }
.calc-more { margin: 6px 0 0; font-size: 12px; color: rgba(var(--b-rgb), .45); min-height: 1.5em; text-align: right; }

/* ---------- 实战回放 ---------- */
/* 首屏流程演示 */
.hero-replay { margin-top: 48px; scroll-margin-top: 80px; padding: clamp(16px, 2.6vw, 28px);
  background: color-mix(in srgb, var(--line) 28%, var(--bg)); border: 1px solid var(--line); box-shadow: var(--card-shadow); }
.rp-cap { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; margin: 0 0 18px; }
.rp-live { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; color: var(--deep); padding: 5px 12px 5px 10px; border-radius: 999px; background: var(--glass); border: 1px solid var(--glass-line); }
.rp-live i { width: 7px; height: 7px; border-radius: 50%; background: var(--red); animation: ping 2s ease-out infinite; box-shadow: 0 0 0 0 var(--red); }
.rp-sub { font-size: 14px; color: var(--ink-2); }

.rp-grid { display: grid; grid-template-columns: 290px minmax(0, 1fr); gap: 22px; align-items: stretch; }
.rp-steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.rp-step {
  position: relative; overflow: hidden; width: 100%; display: flex; align-items: center; gap: 12px; text-align: left;
  padding: 11px 14px; border-radius: 16px; border: 1px solid transparent; background: transparent; color: var(--ink);
  font: inherit; cursor: pointer; transition: background .25s, box-shadow .25s, border-color .25s;
}
.rp-step:hover { background: color-mix(in srgb, var(--surface) 55%, transparent); }
.rp-step.on { background: var(--surface); border-color: var(--line); box-shadow: var(--card-shadow); }
.rp-n { flex: none; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; font-size: 13px; font-weight: 700; color: var(--muted); border: 1.5px solid var(--line-2); background: var(--surface); }
.rp-step.done .rp-n { color: var(--on-accent); background: var(--accent); border-color: var(--accent); }
.rp-step.on .rp-n { color: var(--on-accent); background: var(--deep); border-color: var(--deep); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent); }
.rp-t { display: flex; flex-direction: column; min-width: 0; }
.rp-t b { font-size: 15px; font-weight: 700; line-height: 1.35; }
.rp-t small { font-size: 12px; color: var(--muted); line-height: 1.45; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rp-bar { position: absolute; left: 0; bottom: 0; height: 2px; width: 0; background: var(--accent); }
.replay.run .rp-step.on .rp-bar { animation: prog 6s linear forwards; }
@keyframes prog { to { width: 100%; } }
.rp-detail { padding: 24px 26px 26px; min-height: 470px; }
.rp-top { display: flex; align-items: center; gap: 10px; padding-bottom: 16px; margin-bottom: 18px; border-bottom: 1px solid var(--line); }
.rp-title { font-size: 16px; font-weight: 700; line-height: 1.4; flex: 1; min-width: 0; }
.rp-play { flex: none; width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--line-2); background: var(--surface); display: grid; place-items: center; cursor: pointer; }
.ic-pause { width: 10px; height: 12px; border-left: 3px solid var(--ink); border-right: 3px solid var(--ink); }
.rp-play.paused .ic-pause { width: 0; height: 0; border: 0; border-left: 11px solid var(--ink); border-top: 7px solid transparent; border-bottom: 7px solid transparent; margin-left: 3px; }
.replay.js .rp-panel { display: none; }
.replay.js .rp-panel.on { display: block; animation: panelin .5s cubic-bezier(.2,.8,.2,1); }
.replay:not(.js) .rp-panel + .rp-panel { margin-top: 28px; padding-top: 24px; border-top: 1px dashed var(--line-2); }
@keyframes panelin { from { opacity: 0; transform: translateY(10px); } }
.rp-panel > * + * { margin-top: 16px; }
.rp-h { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 12px; margin: 0; }
.rp-role { font-size: 18px; font-weight: 800; }
.rp-meta { font-size: 12px; color: var(--muted); padding: 3px 10px; border-radius: 999px; background: color-mix(in srgb, var(--line) 55%, var(--surface)); }
.files { display: flex; flex-wrap: wrap; gap: 8px; }
.file { display: inline-flex; align-items: center; gap: 7px; font-size: 13.5px; padding: 8px 12px; border-radius: 12px; border: 1px solid var(--line); background: color-mix(in srgb, var(--line) 25%, var(--surface)); }
.file svg { width: 17px; height: 17px; color: var(--accent); }
.file em { font-style: normal; font-size: 12px; color: var(--muted); }
.file.out { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); background: color-mix(in srgb, var(--accent) 8%, var(--surface)); }
.facts { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.facts li { position: relative; padding-left: 18px; font-size: 15px; line-height: 1.7; }
.facts li::before { content: ""; position: absolute; left: 3px; top: .72em; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.facts li.infer { color: var(--muted); }
.facts li.infer::before { background: transparent; border: 1.5px solid var(--warn); }
.src { display: inline-flex; align-items: center; gap: 4px; margin-left: 4px; font-size: 12px; font-weight: 600; line-height: 1.5; padding: 1px 8px; border-radius: 7px; color: var(--deep); background: color-mix(in srgb, var(--accent) 11%, transparent); white-space: nowrap; vertical-align: 1px; }
.src svg { width: 12px; height: 12px; }
.rp-conclusion { margin: 0; font-size: 16px; padding: 12px 14px; border-radius: 12px; background: color-mix(in srgb, var(--accent) 9%, transparent); }
.rp-conclusion b { color: var(--deep); }
.opinions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.op { padding: 14px 16px; border-radius: 14px; border: 1px solid var(--line); background: color-mix(in srgb, var(--line) 18%, var(--surface)); }
.op b { font-size: 14.5px; margin-left: 6px; }
.op p { margin: 6px 0 0; font-size: 13.5px; line-height: 1.65; color: var(--ink-2); }
.stance-chip { font-size: 12px; font-weight: 700; padding: 1px 9px; border-radius: 999px; }
.stance-chip.ok { color: var(--ok); background: color-mix(in srgb, var(--ok) 15%, transparent); }
.stance-chip.warn { color: var(--warn); background: color-mix(in srgb, var(--warn) 16%, transparent); }
.stance-chip.red { color: var(--red); background: color-mix(in srgb, var(--red) 14%, transparent); }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.checks li { display: flex; align-items: center; flex-wrap: wrap; gap: 4px 10px; font-size: 14.5px; padding: 9px 12px; border-radius: 12px; background: color-mix(in srgb, var(--line) 22%, var(--surface)); }
.checks svg { width: 17px; height: 17px; stroke-width: 2.2; flex: none; }
.checks .ok svg { color: var(--ok); }
.checks .bad { background: color-mix(in srgb, var(--red) 9%, transparent); color: var(--ink); }
.checks .bad svg { color: var(--red); }
.checks .bad b { color: var(--red); }
.rp-note { margin: 0; font-size: 13.5px; color: var(--muted); line-height: 1.7; padding-left: 12px; border-left: 3px solid color-mix(in srgb, var(--accent) 55%, transparent); }
.rp-opts { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.rp-opts li { display: flex; align-items: center; gap: 12px; padding: 12px 14px; border-radius: 14px; border: 1px solid var(--line); }
.rp-opts li > span, .tap-card > span { flex: none; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; font-size: 14px; font-weight: 800; color: var(--deep); border: 1.5px solid color-mix(in srgb, var(--accent) 60%, transparent); }
.rp-opts li.rec > span, .tap-card > span { color: var(--on-accent); background: var(--accent); border-color: var(--accent); }
.rp-opts li div { display: flex; flex-direction: column; min-width: 0; }
.rp-opts li b { font-size: 15px; }
.rp-opts li small { font-size: 13px; color: var(--muted); line-height: 1.55; }
.rp-opts li em { margin-left: auto; flex: none; font-style: normal; font-size: 12px; font-weight: 700; color: var(--accent); }
.rp-opts li.rec { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 9%, transparent); }
.tap-demo { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; padding: 22px; border-radius: 18px; background: color-mix(in srgb, var(--accent) 6%, transparent); }
.tap-card { position: relative; display: flex; align-items: center; gap: 10px; font-size: 16px; font-weight: 700; padding: 14px 56px 14px 16px; border-radius: 14px; border: 1.5px solid var(--accent); background: var(--surface); box-shadow: var(--lift); }
.tap-card em { font-style: normal; font-size: 12px; color: var(--accent); margin-left: 6px; }
.tap-dot { position: absolute; right: 16px; top: 50%; width: 22px; height: 22px; margin-top: -11px; border-radius: 50%; background: color-mix(in srgb, var(--accent) 45%, transparent); animation: tap 2.4s ease-out infinite; }
@keyframes tap { 0% { transform: scale(.4); opacity: 0; } 20% { transform: scale(1); opacity: 1; } 60%, 100% { transform: scale(2.4); opacity: 0; } }
.tap-done { display: inline-flex; align-items: center; gap: 8px; margin: 0; font-size: 14px; font-weight: 600; padding: 8px 14px; border-radius: 999px; background: var(--ink); color: var(--bg); }
.tap-done svg { width: 15px; height: 15px; }
.rp-lesson { max-width: 460px; }


/* ---------- 模型与记忆 ---------- */
.providers { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.prov { padding: 22px 22px 20px; }
.prov { position: relative; overflow: hidden; }
.prov::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px; }
.p-a::before { background: #D97757; } .p-o::before { background: var(--ink); } .p-z::before { background: linear-gradient(90deg, #3E63DD, #6E56CF); }
.prov-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding-bottom: 16px; margin-bottom: 14px; border-bottom: 1px solid var(--line); }
.prov-logo { display: inline-flex; align-items: center; gap: 8px; color: var(--ink); height: 26px; }
.prov-logo svg { display: block; height: 100%; width: auto; }
.prov-logo .lg-mark { height: 26px; }
.p-a .prov-logo { height: 17px; }
.p-o .prov-logo .lg-word { height: 22px; }
.p-z .prov-logo .lg-word { height: 22px; }
.prov-note { margin-top: 14px; }
.prov-fam { font-size: 12.5px; color: var(--muted); white-space: nowrap; }
.prov-models { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.prov-models li { display: flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 600; }
.prov-models li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex: none; }
.prov-models small { font-size: 11.5px; font-weight: 700; color: var(--deep); padding: 0 7px; border-radius: 999px; background: color-mix(in srgb, var(--accent) 12%, transparent); }
.mm-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 24px; align-items: center; margin-top: 28px; }
.mm-fig .memory { max-width: 520px; }
.mm-cards { display: grid; gap: 14px; }
.trio .card > svg { display: block; width: 26px; height: 26px; color: var(--accent); margin-bottom: 10px; }
#failover .drills { margin-top: 16px; }

/* ---------- 引擎内核 ---------- */
.core { display: grid; grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr); gap: clamp(24px, 4vw, 48px); align-items: start; }
.core-head .body { font-size: 16.5px; }
.core-tags { list-style: none; padding: 0; margin: 22px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.core-tags li { font-size: 12.5px; font-weight: 600; color: var(--ink-2); padding: 4px 11px; border-radius: 999px; border: 1px solid var(--line-2); }
.code {
  --code-bg: #FFFCF9; --code-ink: #3A322D; --code-k: #AE5630; --code-n: #2F7D62; --code-c: #A0938A; --code-ln: #CBBFB4;
  border-radius: 20px; overflow: hidden; background: var(--code-bg); border: 1px solid var(--line); box-shadow: var(--lift);
}
@media (prefers-color-scheme: dark) {
  .code { --code-bg: #15110F; --code-ink: #E6DCD3; --code-k: #F4A884; --code-n: #8FD1B0; --code-c: #7D7068; --code-ln: #4A403A; }
}
.code-bar { display: flex; align-items: center; gap: 6px; padding: 10px 12px 0 14px; border-bottom: 1px solid var(--line); }
.code-bar > i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); }
.code-tabs { display: flex; gap: 2px; margin-left: 12px; overflow-x: auto; }
.ct { font: inherit; font-size: 13px; font-weight: 600; color: var(--muted); background: none; border: 0; padding: 8px 12px 10px; cursor: pointer; border-bottom: 2px solid transparent; white-space: nowrap; }
.ct:hover { color: var(--ink); }
.ct.on { color: var(--ink); border-bottom-color: var(--accent); }
.cp { margin: 0; padding: 18px 18px 8px 10px; overflow-x: auto; font-family: ui-monospace, "SF Mono", Menlo, Consolas, "PingFang SC", monospace; font-size: 13px; line-height: 1.9; color: var(--code-ink); tab-size: 2; }
.code.js .cp { display: none; }
.code.js .cp.on { display: block; animation: panelin .4s ease; }
.code:not(.js) .cp + .cp { border-top: 1px dashed var(--line); }
.cp code { font: inherit; white-space: pre; }
.cp .ln { display: inline-block; width: 2.4em; padding-right: .9em; text-align: right; color: var(--code-ln); user-select: none; }
.cp .k { color: var(--code-k); font-weight: 700; }
.cp .n { color: var(--code-n); }
.cp .c { color: var(--code-c); font-style: normal; }
.rd { display: inline-block; color: transparent; background: repeating-linear-gradient(135deg, var(--ink) 0 3px, color-mix(in srgb, var(--ink) 80%, transparent) 3px 6px); border-radius: 3px; line-height: 1.1; letter-spacing: -.1em; vertical-align: -1px; user-select: none; }
.code-foot { margin: 0; padding: 10px 16px 14px; font-size: 12px; color: var(--muted); border-top: 1px solid var(--line); }
.code-foot .rd { font-size: 10px; margin-right: 4px; }


/* 回放：统计条与新元素 */
.rp-stats { list-style: none; padding: 0; margin: 0 0 18px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.rp-stats li { padding: 12px 16px; border-radius: 16px; background: var(--surface); border: 1px solid var(--line); }
.rp-stats b { display: block; font-size: 26px; font-weight: 800; letter-spacing: -.02em; line-height: 1.15; background: linear-gradient(100deg, var(--accent), var(--deep)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.rp-stats span { font-size: 12.5px; color: var(--muted); }
.replay.js .rp-panel.on > * { animation: panelin .55s cubic-bezier(.2,.8,.2,1) both; }
.replay.js .rp-panel.on > *:nth-child(2) { animation-delay: .12s; } .replay.js .rp-panel.on > *:nth-child(3) { animation-delay: .24s; }
.replay.js .rp-panel.on > *:nth-child(4) { animation-delay: .36s; } .replay.js .rp-panel.on > *:nth-child(5) { animation-delay: .48s; }
.file .st { font-style: normal; font-size: 11.5px; font-weight: 700; padding: 1px 8px; border-radius: 999px; color: var(--muted); background: color-mix(in srgb, var(--line) 70%, transparent); }
.file .st.red { color: var(--red); background: color-mix(in srgb, var(--red) 12%, transparent); }
.file .st.warn { color: var(--warn); background: color-mix(in srgb, var(--warn) 15%, transparent); }
.file.blocked { opacity: .7; text-decoration: line-through; text-decoration-color: color-mix(in srgb, var(--red) 60%, transparent); }
.file.blocked .st { text-decoration: none; display: inline-block; }
.file.newver { border-color: color-mix(in srgb, var(--warn) 50%, var(--line)); }
.diff { border-radius: 14px; border: 1px solid color-mix(in srgb, var(--warn) 40%, var(--line)); background: color-mix(in srgb, var(--warn) 6%, var(--surface)); padding: 14px 16px; }
.diff-h { margin: 0 0 8px; font-size: 13px; font-weight: 700; color: var(--warn); }
.diff-row { margin: 0; display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; font-size: 15px; }
.diff-k { font-weight: 600; }
.diff del { color: var(--muted); text-decoration-color: var(--red); }
.diff ins { text-decoration: none; font-weight: 800; color: var(--red); padding: 0 6px; border-radius: 6px; background: color-mix(in srgb, var(--red) 12%, transparent); animation: glow 2.4s ease-in-out infinite; }
.diff-arrow { color: var(--muted); }
@keyframes glow { 50% { box-shadow: 0 0 0 4px color-mix(in srgb, var(--red) 14%, transparent); } }
.mem { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 10px; }
.mem-g { padding: 14px 16px; border-radius: 14px; border: 1px solid var(--line); background: color-mix(in srgb, var(--line) 18%, var(--surface)); }
.mem-g.quote { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); background: color-mix(in srgb, var(--accent) 7%, var(--surface)); }
.mem-l { display: block; font-size: 12px; font-weight: 700; color: var(--deep); margin-bottom: 6px; }
.mem-g p { margin: 0; font-size: 14px; line-height: 1.6; }
.mem-g.quote p { font-weight: 700; }
.mem-g small { display: block; margin-top: 6px; font-size: 12px; color: var(--muted); line-height: 1.5; }
.mem-g ul { margin: 0; padding-left: 16px; font-size: 13.5px; line-height: 1.7; }
.merge { display: grid; grid-template-columns: minmax(0, 1fr) 70px minmax(0, .9fr); align-items: center; gap: 0; }
.merge-in { display: grid; gap: 10px; }
.mi { padding: 10px 14px; border-radius: 12px; border: 1px solid var(--line); background: color-mix(in srgb, var(--line) 18%, var(--surface)); display: flex; flex-direction: column; }
.mi b { font-size: 14px; } .mi small { font-size: 12px; color: var(--muted); }
.mi em { font-style: normal; font-size: 11.5px; font-weight: 700; margin-top: 4px; }
.mi em.auto { color: var(--ok); } .mi em.ask { color: var(--warn); }
.merge-lines { width: 100%; height: 100%; min-height: 160px; }
.merge-lines path { fill: none; stroke: var(--accent); stroke-width: 2; stroke-dasharray: 5 5; vector-effect: non-scaling-stroke; animation: flow 1.2s linear infinite reverse; }
.merge-out { padding: 18px; border-radius: 16px; border: 1.5px solid var(--accent); background: color-mix(in srgb, var(--accent) 8%, var(--surface)); box-shadow: var(--lift); display: flex; flex-direction: column; gap: 6px; align-items: flex-start; }
.merge-out b { font-size: 17px; } .merge-out small { font-size: 12.5px; color: var(--muted); line-height: 1.5; }
.clues { display: grid; gap: 8px; }
.clue { font-size: 14.5px; padding: 10px 14px; border-radius: 12px; background: color-mix(in srgb, var(--line) 22%, var(--surface)); border: 1px solid var(--line); }
.clue > span { display: inline-block; font-size: 11.5px; font-weight: 800; color: var(--on-accent); background: var(--accent); padding: 1px 8px; border-radius: 999px; margin-right: 8px; }
.infer-box { position: relative; padding: 16px 18px; border-radius: 16px; border: 1.5px dashed color-mix(in srgb, var(--warn) 60%, transparent); background: color-mix(in srgb, var(--warn) 7%, var(--surface)); }
.infer-box p { margin: 0; font-size: 15px; line-height: 1.7; }
.infer-box b { color: var(--deep); }
.infer-h { font-size: 12.5px !important; font-weight: 700; color: var(--warn); margin-bottom: 4px !important; }
.infer-how { margin-top: 8px !important; font-size: 13px !important; color: var(--muted); }

/* 进场动画：只隐藏首屏以外的块 */
.reveal.pre { opacity: 0; transform: translateY(28px); }
.reveal.in { opacity: 1; transform: none; transition: opacity .9s ease, transform .9s cubic-bezier(.2,.8,.2,1); }

/* ---------- 窄屏 ---------- */
@media (max-width: 960px) {
    .roles { grid-template-columns: repeat(3, 1fr); }
  .boss-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .boss-grid .phone { grid-column: 1 / -1; grid-row: 1; margin-bottom: 16px; }
  .callouts.left { text-align: left; }
  .check-demo { grid-template-columns: 1fr; }
  .lesson { flex-direction: column; }
  .lesson-arrow { transform: rotate(90deg); width: 44px; }
  .lesson-card { width: 100%; }
  .bento { grid-template-columns: 1fr 1fr; }
  .providers { grid-template-columns: 1fr; }
  .mm-grid { grid-template-columns: 1fr; }
  .core { grid-template-columns: 1fr; }
  .spec-grid { grid-template-columns: 1fr 1fr; }
  .calc { grid-template-columns: 1fr; }
    .rp-grid { grid-template-columns: 1fr; }
  .rp-steps { grid-template-columns: repeat(8, 1fr); gap: 4px; }
  .rp-step { justify-content: center; padding: 8px 0; }
  .rp-t { display: none; }
  .rp-detail { min-height: 0; }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .topbar-links { gap: 14px; font-size: 13px; }
  .topbar-links:has(.nav-system) { gap: 8px; }
  .topbar-links:has(.nav-system) .nav-cta { padding-inline: 10px; }
  .topbar-links a:not(.nav-cta) { display: none; }
  .topbar .logo { font-size: 18px; }
  .hero { padding-top: 64px; }
  .badge { font-size: 12.5px; margin-bottom: 24px; }
  .br-d { display: none; }
  .stage, .statement, .closing { border-radius: 24px; }
  .stage { margin-top: 32px; padding: 18px; }
  .sec { padding-top: 100px; }
  .body { font-size: 16.5px; }
  h2 { font-size: 26px; line-height: 1.32; }
  .st-big { font-size: 24px; }
  .closing h2 { font-size: 28px; }
  .hero-title { font-size: 46px; }
  .compare { grid-template-columns: 1fr; }
  .cmp-arrow { transform: rotate(90deg); width: 40px; height: 40px; }
  .cmp { padding: 20px; }
  .roles { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .role { padding: 16px 14px 14px; }
  .boss-grid { grid-template-columns: 1fr; }
  .phone { width: 100%; max-width: 300px; }
  .model-demo, .bento, .trio { grid-template-columns: 1fr; }
  .dev-labels { grid-template-columns: 1fr; gap: 10px; }
  .drills li { grid-template-columns: 64px minmax(0, 1fr) 66px; gap: 8px; font-size: 13px; }
  .widget.small { width: 100%; max-width: 340px; }
  .statement, .closing { margin-top: 100px; }
  .divider { margin: 110px 0 -30px; font-size: 13px; }
  .fig .failover-d { display: none; }
  .fig .failover-m { display: block; }
  .chart .axis text, .chart .xlab text { font-size: 24px; }
  .chart .val { font-size: 24px; }
  .memory .stack text { font-size: 23px; }
  .memory .model text { font-size: 24px; }
  .calc { padding: 18px 16px; }
  .calc-viz { min-height: 200px; }
  .calc-viz .lanes { min-height: 170px; }
  .pills button { padding: 6px 11px; font-size: 13px; }
  .spec-grid li { padding: 18px 14px; }
  .spec-grid b { font-size: 32px; }
  .spec-grid small { font-size: 12px; }
  .rp-detail { padding: 18px 16px 20px; }
  .rp-top { flex-wrap: wrap; }
  .opinions { grid-template-columns: 1fr; }
  .rp-stats { grid-template-columns: repeat(4, 1fr); gap: 6px; }
  .rp-stats li { padding: 8px 8px; border-radius: 12px; }
  .rp-stats b { font-size: 18px; }
  .rp-stats span { font-size: 11px; line-height: 1.35; display: block; }
  .mem { grid-template-columns: 1fr; }
  .merge { grid-template-columns: 1fr; }
  .merge-lines { display: none; }
  .merge-out { margin-top: 12px; }
  .cp { font-size: 11.5px; padding: 14px 12px 6px 4px; }
  .rp-role { font-size: 16.5px; }
  .src { white-space: normal; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .ph-toast { opacity: 1; }
  .reveal.pre { opacity: 1; transform: none; }
}