/* ============================================================
   启研 · 中学生数据科学研究性学习项目 — 独立公开落地页 (LIGHT · CINEMATIC)
   Standalone, zero portal coupling. Light "paper with quality" design
   tokens from the portal + a cinematic layer (Lenis smooth scroll,
   GSAP/ScrollTrigger parallax · reveals · pinned image-expansion,
   VanillaTilt 3D cards, custom cursor, SVG path draw). Motion is
   progressive enhancement: base state fully visible; the `.gsap-on`
   class (set by script.js only when GSAP is present AND motion is OK)
   opts into the cinematic hidden→animated states. Everything honours
   prefers-reduced-motion.
   ============================================================ */

@font-face { font-family: "Frutiger"; src: url("assets/fonts/Frutiger.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Frutiger"; src: url("assets/fonts/Frutiger_bold.ttf") format("truetype"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Goldman Sans"; src: url("assets/fonts/GoldmanSans_Rg.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Goldman Sans"; src: url("assets/fonts/GoldmanSans_Md.ttf") format("truetype"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Goldman Sans"; src: url("assets/fonts/GoldmanSans_Bd.ttf") format("truetype"); font-weight: 700; font-display: swap; }

:root {
  --canvas: #EDF1F8; --canvas-2: #F3F6FB; --surface: #FBFCFE; --overlay: #FFFFFF;
  --muted: #E6ECF5; --line: #D5DEEC; --line-soft: #E4EAF4;
  --ink1: #0B1827; --ink2: #3B5470; --ink3: #52728A; --ink4: #7C93AB;
  --cyan: #007AA8; --cyan-soft: #2699C4; --cyan-deep: #005A80; --cyan-rgb: 0, 122, 168;
  --institution: #1C527F; --institution-hi: #2E6FA8; --ok: #2E9E6B;
  --t-label: 12px; --t-body: 15px; --t-lead: 17px; --t-section: 19px;
  --sh-1: 0 1px 2px rgba(11,24,39,.04), 0 1px 3px rgba(11,24,39,.05);
  --sh-2: 0 6px 16px rgba(11,24,39,.06), 0 2px 5px rgba(11,24,39,.05);
  --sh-3: 0 20px 48px rgba(11,24,39,.12), 0 6px 14px rgba(11,24,39,.07);
  --sh-4: 0 40px 90px rgba(11,24,39,.16), 0 12px 24px rgba(11,24,39,.08);
  --sh-cyan: 0 10px 26px rgba(var(--cyan-rgb), .28);
  --ease: cubic-bezier(.2, .7, .2, 1);
  --font-display: "Frutiger", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Goldman Sans", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --maxw: min(1360px, 94vw);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
/* 场景吸附走 JS settle(Lenis 路径, 见 script.js snap 模块); CSS snap 只作无 JS 兜底
   (Lenis 与原生 snap 并跑会打架 — PLAN-scenes 底盘批) */
html:not(.lx-js) { scroll-snap-type: y proximity; }
html:not(.lx-js) .scene { scroll-snap-align: start; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-smooth [data-lenis-prevent] { overscroll-behavior: contain; }
.lenis.lenis-stopped { overflow: hidden; }
@media (prefers-reduced-motion: reduce) { html { scroll-snap-type: none; scroll-behavior: auto; } }

body { background: var(--canvas); color: var(--ink1); font-family: var(--font-body);
  font-size: var(--t-body); line-height: 1.6; -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; }
::selection { background: rgba(var(--cyan-rgb), .16); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(16px, 2vw, 28px); }
.section { padding: clamp(140px, 15vh, 190px) 0; }
/* ============ 场景系统底盘(PLAN-scenes 批1) ============ */
/* 等高 scene: 每幕 100svh 内容垂直居中; 内容超高自然长高; 窄屏释放 */
.scene { position: relative; overflow: hidden; min-height: 100svh; display: flex; align-items: center; padding: 0; }
.section.scene, .faculty.scene, .final-sec.scene { padding: 0; } /* 071726 审查: 压住后段大 padding */
.scene > .wrap { width: 100%; position: relative; z-index: 1; padding-block: clamp(88px, 11vh, 120px); }
/* 工程网格全页化: 与 hero #webgl-stage::before 同规 56px, 光池 mask 同族;
   浓度三档 = canvas 幕 / 白章节带 / 制图负片 */
.scene { --grid-ink: rgba(11,24,39,.045); }
.scene--band { --grid-ink: rgba(11,24,39,.03); background: var(--surface); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.scene::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    repeating-linear-gradient(0deg, var(--grid-ink) 0 1px, transparent 1px 56px),
    repeating-linear-gradient(90deg, var(--grid-ink) 0 1px, transparent 1px 56px);
  -webkit-mask-image: radial-gradient(115% 100% at 50% 42%, #000 55%, rgba(0,0,0,.3));
  mask-image: radial-gradient(115% 100% at 50% 42%, #000 55%, rgba(0,0,0,.3));
}
/* ============ 排版系统(PLAN-scenes 批2) ============ */
/* 配准芯片 reg-chip: 器物铭牌(直角)+幕编号+右下配准三角(polygon ◤ 的制图翻译) */
.reg-chip {
  display: inline-flex; align-items: center; gap: 10px; padding: 7px 14px;
  border: 1px solid var(--line); background: var(--surface); border-radius: 2px;
  font: 500 11px/1 var(--font-body); letter-spacing: .22em; text-transform: uppercase;
  color: var(--ink3); position: relative;
}
.reg-chip__no { font-weight: 700; color: var(--ink1); font-variant-numeric: tabular-nums; padding-right: 10px; border-right: 1px solid var(--line); }
.reg-chip--neg { border-color: rgba(251,252,254,.35); background: transparent; color: rgba(251,252,254,.72); }
.reg-chip--neg .reg-chip__no { color: #FBFCFE; border-right-color: rgba(251,252,254,.35); }
.reg-chip--neg::after { border-color: transparent transparent var(--cyan-neg, #6FD1FF) transparent !important; }
.reg-chip::after {
  content: ""; position: absolute; right: -1px; bottom: -1px; width: 0; height: 0;
  border-style: solid; border-width: 0 0 7px 7px;
  border-color: transparent transparent var(--cyan) transparent; transform-origin: 100% 100%;
}
/* 拓印+落章进场(is-settled 驱动; 无JS/reduce 直接可见) */
.lx-js .scene .reg-chip { opacity: 0; transform: scale(.96); transition: opacity .12s var(--ease), transform .12s var(--ease); }
.lx-js .scene .reg-chip--neg { border-color: rgba(251,252,254,.35); background: transparent; color: rgba(251,252,254,.72); }
.reg-chip--neg .reg-chip__no { color: #FBFCFE; border-right-color: rgba(251,252,254,.35); }
.reg-chip--neg::after { border-color: transparent transparent var(--cyan-neg, #6FD1FF) transparent !important; }
.reg-chip::after { transform: scale(.6); transition: transform .25s var(--ease) .12s; }
.lx-js .scene.is-settled .reg-chip, html.qy-reveal .scene .reg-chip { opacity: 1; transform: none; }
.lx-js .scene.is-settled .reg-chip::after, html.qy-reveal .scene .reg-chip--neg { border-color: rgba(251,252,254,.35); background: transparent; color: rgba(251,252,254,.72); }
.reg-chip--neg .reg-chip__no { color: #FBFCFE; border-right-color: rgba(251,252,254,.35); }
.reg-chip--neg::after { border-color: transparent transparent var(--cyan-neg, #6FD1FF) transparent !important; }
.reg-chip::after { transform: scale(1); }
/* 双色显示标题: 实墨承主张, 灰墨承限定/余韵; 每幕至多一处 dim */
h2 em.dim { font-style: normal; color: var(--ink4); }
.h2--xl { font-size: clamp(42px, 5.6vw, 76px) !important; line-height: 1.14; }
/* line-mask 揭示(settle 驱动; hero 的 .ln 不受影响——仅 .scene 作用域) */
.scene .ln { display: block; overflow: hidden; padding-bottom: .06em; }
.scene .ln > span { display: block; }
.lx-js .scene .ln > span { transform: translateY(110%); transition: transform .9s cubic-bezier(.16,1,.3,1); }
.lx-js .scene .ln:nth-child(2) > span { transition-delay: .12s; }
.lx-js .scene .ln:nth-child(3) > span { transition-delay: .24s; }
.lx-js .scene.is-settled .ln > span, html.qy-reveal .scene .ln > span { transform: none; }
html.qy-reveal .lx-reveal { opacity: 1 !important; transform: none !important; filter: none !important; } /* 调试: headless IO 不触发时的强制揭示 */
@media (prefers-reduced-motion: reduce) {
  .lx-js .scene .reg-chip { opacity: 1; transform: none; }
  .lx-js .scene .reg-chip--neg { border-color: rgba(251,252,254,.35); background: transparent; color: rgba(251,252,254,.72); }
.reg-chip--neg .reg-chip__no { color: #FBFCFE; border-right-color: rgba(251,252,254,.35); }
.reg-chip--neg::after { border-color: transparent transparent var(--cyan-neg, #6FD1FF) transparent !important; }
.reg-chip::after { transform: none; }
  .lx-js .scene .ln > span { transform: none; transition: none; }
}

/* ============ 切角白瓷卡系统(PLAN-scenes 批3) ============ */
/* 三层配方: 外层不裁切挂接触影 / 中层切角=1px 描边 / 内层白瓷面。
   切角在左上+右下(与 reg-chip 配准三角同方位系统)。禁 tilt/glare。 */
.qy-card { position: relative; transition: transform .22s var(--ease); }
.qy-card::after {
  content: ""; position: absolute; left: 50%; bottom: -9px; width: 78%; height: 14px;
  transform: translateX(-50%);
  background: radial-gradient(50% 50% at 50% 50%, rgba(11,24,39,.15), transparent 72%);
  transition: transform .22s var(--ease), opacity .22s var(--ease);
  pointer-events: none;
}
.notch { --n: 18px; clip-path: polygon(var(--n) 0, 100% 0, 100% calc(100% - var(--n)), calc(100% - var(--n)) 100%, 0 100%, 0 var(--n)); background: var(--line); }
.notch__body { margin: 1px; clip-path: polygon(17px 0, 100% 0, 100% calc(100% - 17px), calc(100% - 17px) 100%, 0 100%, 0 17px); background: var(--surface); padding: clamp(20px, 2vw, 26px); }
.notch--hl { background: rgba(var(--cyan-rgb), .4); }
.qy-card .cardrow { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 10px; }
.qy-card .no { font-size: 12px; font-weight: 600; color: var(--ink4); font-variant-numeric: tabular-nums; }
.qy-card .tag { font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink3); transition: color .2s var(--ease); }
.qy-card b, .qy-card h3 { font-family: var(--font-display); font-weight: 700; font-size: var(--t-section); color: var(--ink1); display: block; margin-top: 6px; }
.qy-card p { font-size: var(--t-body); line-height: 1.6; color: var(--ink2); margin-top: 8px; }
.qy-card:hover { transform: translateY(-3px); }
.qy-card:hover::after { transform: translateX(-50%) scaleX(1.06); opacity: .8; }
.qy-card:hover .tag { color: var(--cyan); }

/* produce · 非对称阶梯分栏 */
.split { display: grid; grid-template-columns: 5fr 7fr; gap: clamp(36px, 4vw, 64px); align-items: center; }
.split__stack { display: flex; flex-direction: column; gap: 22px; }
.split__stack .qy-card:nth-child(2) { margin-left: 28px; }
.split__stack .qy-card:nth-child(3) { margin-left: 56px; }
.split__stack .pcard__viz { padding: 4px 0 2px; }
.split__stack .pcard__viz svg { height: 84px; width: auto; max-width: 100%; display: block; }
.confs.confs--rail { margin-top: 34px; text-align: left; }
.confs--rail .confs__row { justify-content: flex-start; gap: 8px 18px; margin-top: 12px; }
.confs--rail .confs__row span { font-size: 18px; }
/* 落桌进场(settle 驱动): 影先张开, 卡随后落定 */
.lx-js .scene .split__stack .qy-card { opacity: 0; transform: translateY(24px); transition: opacity .7s cubic-bezier(.16,1,.3,1), transform .7s cubic-bezier(.16,1,.3,1); }
.lx-js .scene .split__stack .qy-card::after { transform: translateX(-50%) scaleX(0); transition: transform .4s var(--ease); }
.lx-js .scene .split__stack .qy-card:nth-child(2) { transition-delay: .09s; }
.lx-js .scene .split__stack .qy-card:nth-child(3) { transition-delay: .18s; }
.lx-js .scene.is-settled .split__stack .qy-card, html.qy-reveal .split__stack .qy-card { opacity: 1; transform: none; }
.lx-js .scene.is-settled .split__stack .qy-card::after, html.qy-reveal .split__stack .qy-card::after { transform: translateX(-50%) scaleX(1); }
/* 落定瞬间卡内墨线各播一次(hover 仍可重播) */
.lx-js .scene.is-settled .pcard__viz .pv-sweep { animation: pv-sweep .7s var(--ease); }
.lx-js .scene.is-settled .pcard__viz .pv-draw { animation: pv-draw .8s var(--ease); }
.qy-card:hover .pv-sweep { animation: pv-sweep .7s var(--ease); }
.qy-card:hover .pv-draw { animation: pv-draw .8s var(--ease); }
@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; }
  .split__stack .qy-card:nth-child(2), .split__stack .qy-card:nth-child(3) { margin-left: 0; }
}
@media (prefers-reduced-motion: reduce) {
  .lx-js .scene .split__stack .qy-card { opacity: 1; transform: none; transition: none; }
  .lx-js .scene .split__stack .qy-card::after { transform: translateX(-50%) scaleX(1); }
}

/* ============ 制图负片幕(PLAN-scenes 批4, 全页仅 pipeline 一幕) ============ */
/* 底色 = institution 藏蓝 × ink 覆膜(两枚既有 token 合成, 零新色相);
   负片高亮青 --cyan-neg = portal globals.css 既有 token #6FD1FF——非新色, 勿删。 */
.scene--blueprint {
  --grid-ink: rgba(244,248,252,.075);
  --cyan-neg: #6FD1FF;
  background: linear-gradient(rgba(11,24,39,.5), rgba(11,24,39,.42)), var(--institution, #1C527F);
}
.scene--blueprint .wm { color: rgba(251,252,254,.12); }
.scene--blueprint h2, .scene--blueprint .h2 { color: #FBFCFE; }
.scene--blueprint h2 em.dim { color: rgba(220,233,245,.55); }
.scene--blueprint .sub { color: rgba(251,252,254,.72); }
/* 六阶段 pictogram 负片重皮: 属性选择器整批翻白, 青换负片青 */
.scene--blueprint [stroke='#3B5470'] { stroke: #DCE9F5; }
.scene--blueprint [stroke='#C6D2E4'] { stroke: rgba(220,233,245,.4); }
.scene--blueprint [fill='#FBFCFE'] { fill: transparent; }
.scene--blueprint [stroke='#007AA8'] { stroke: var(--cyan-neg); }
.scene--blueprint [fill='#005A80'], .scene--blueprint [fill='#007AA8'] { fill: var(--cyan-neg); }
.scene--blueprint .stage__cn { color: #FBFCFE; }
.scene--blueprint .stage__desc { color: rgba(251,252,254,.62); }
.scene--blueprint .stage__no, .scene--blueprint .stage__en { color: rgba(220,233,245,.5); }
.scene--blueprint .pipe__base { stroke: rgba(220,233,245,.25); }
.scene--blueprint .pipe__draw { stroke: var(--cyan-neg); }
/* 阶段点逐个上电(settle 后 60ms 步进, 浑天仪 Act IV 同拍法) */
.scene--blueprint .stage__dot i { transition: background .3s var(--ease), transform .3s cubic-bezier(.34,1.6,.64,1); }
.lx-js .scene--blueprint .stage { opacity: 0; transform: translateY(14px); transition: opacity .6s cubic-bezier(.16,1,.3,1), transform .6s cubic-bezier(.16,1,.3,1); }
.lx-js .scene--blueprint.is-settled .stage, html.qy-reveal .scene--blueprint .stage { opacity: 1; transform: none; }
.lx-js .scene--blueprint.is-settled .stage:nth-child(3), html.qy-reveal .scene--blueprint .stage:nth-child(3) { transition-delay: .06s; }
.lx-js .scene--blueprint.is-settled .stage:nth-child(4) { transition-delay: .12s; }
.lx-js .scene--blueprint.is-settled .stage:nth-child(5) { transition-delay: .18s; }
.lx-js .scene--blueprint.is-settled .stage:nth-child(6) { transition-delay: .24s; }
.lx-js .scene--blueprint.is-settled .stage:nth-child(7) { transition-delay: .30s; }
/* 六阶段点的阶段色(负片提亮一档); 协作/成果用 institution 系补位色 */
.scene--blueprint .stage:nth-child(2) .stage__dot i { background: #007AA8; }
.scene--blueprint .stage:nth-child(3) .stage__dot i { background: #C2872B; }
.scene--blueprint .stage:nth-child(4) .stage__dot i { background: #4FA3C8; }
.scene--blueprint .stage:nth-child(5) .stage__dot i { background: #17867B; }
.scene--blueprint .stage:nth-child(6) .stage__dot i { background: #6FD1FF; }
.scene--blueprint .stage:nth-child(7) .stage__dot i { background: #DCE9F5; }
.scene--blueprint .stage__dot { border-color: rgba(220,233,245,.4); }
.scene--blueprint .stage__dot i { filter: brightness(1.2); }
/* (批H 横向 scrub 已撤 — 071726 雇主否: timeline 不左右滑; 滑动语汇转给骑缝卡) */
/* 骑缝 stat 卡: 压在负片底缘与下一幕纸面的缝上 */
.section.scene--blueprint { overflow: visible; }
.scene--blueprint::before { bottom: 0; }
.stats-strip {
  position: absolute; left: 50%; bottom: 0; transform: translate(-50%, 50%);
  width: min(var(--maxw), calc(100% - 56px)); z-index: 3;
  display: grid; grid-template-columns: 1fr 1fr; gap: 28px;
  padding: 0 clamp(16px, 2vw, 28px);
}
.stats-strip .stat__n { font-family: var(--font-display); font-weight: 700; font-size: clamp(34px, 3.4vw, 46px); color: var(--ink1); font-variant-numeric: tabular-nums; }
.stats-strip .stat__n .suf { color: var(--cyan); }
.stats-strip .stat__l { margin-top: 4px; font-size: var(--t-body); color: var(--ink2); }
#features > .wrap { padding-top: calc(clamp(88px, 11vh, 120px) + 8vh); } /* 给骑缝卡让位 */
@media (max-width: 900px) { .stats-strip { position: static; transform: none; width: auto; margin-top: 40px; grid-template-columns: 1fr; } .scene--blueprint { overflow: hidden; } #features > .wrap { padding-top: clamp(88px, 11vh, 120px); } }
@media (prefers-reduced-motion: reduce) { .lx-js .scene--blueprint .stage { opacity: 1; transform: none; transition: none; } }

/* ============ features 零件错落阵(PLAN-scenes 批5) ============ */
.bento { display: grid; grid-template-columns: repeat(12, 1fr); gap: 28px; margin-top: clamp(36px, 4vw, 52px); }
.bento .qy-card:nth-child(1) { grid-column: 1 / span 4; }
.bento .qy-card:nth-child(2) { grid-column: 5 / span 4; margin-top: 56px; }
.bento .qy-card:nth-child(3) { grid-column: 9 / span 4; }
.bento .qy-card:nth-child(4) { grid-column: 3 / span 4; margin-top: -28px; }
.bento .qy-card:nth-child(5) { grid-column: 7 / span 5; margin-top: 28px; }
.bento .card__viz img { height: 96px; width: auto; max-width: 100%; display: block; }
/* 边界卡: cyan hairline + 呼吸点 + 中文小签 */
.qy-card .tag .bdot { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); margin-right: 7px; vertical-align: 1px; animation: bdot-breathe 2.4s var(--ease) infinite; }
@keyframes bdot-breathe { 0%,100% { opacity: 1; transform: scale(1); } 50% { opacity: .45; transform: scale(.8); } }
.qy-card--hl .tag { color: var(--cyan-deep); letter-spacing: .14em; }
/* 对角波进场(左上→右下 空间序): 1,2,4 → 3,5 */
.lx-js .scene .bento .qy-card { opacity: 0; transform: translateY(20px); transition: opacity .65s cubic-bezier(.16,1,.3,1), transform .65s cubic-bezier(.16,1,.3,1); }
.lx-js .scene.is-settled .bento .qy-card, html.qy-reveal .bento .qy-card { opacity: 1; transform: none; }
.lx-js .scene.is-settled .bento .qy-card:nth-child(2) { transition-delay: .07s; }
.lx-js .scene.is-settled .bento .qy-card:nth-child(4) { transition-delay: .14s; }
.lx-js .scene.is-settled .bento .qy-card:nth-child(3) { transition-delay: .21s; }
.lx-js .scene.is-settled .bento .qy-card:nth-child(5) { transition-delay: .28s; }
@media (max-width: 1100px) {
  .bento { grid-template-columns: repeat(2, 1fr); }
  .bento .qy-card { grid-column: auto !important; margin-top: 0 !important; }
}
@media (max-width: 760px) { .bento { grid-template-columns: 1fr; } }
@media (prefers-reduced-motion: reduce) { .lx-js .scene .bento .qy-card { opacity: 1; transform: none; transition: none; } .qy-card .tag .bdot { animation: none; } }

/* ============ themes 尺度对撞×索引行(PLAN-scenes 批6) ============ */
.themes-split { display: grid; grid-template-columns: 5fr 7fr; gap: 56px; align-items: center; }
.display-num { display: block; font-family: var(--font-display); font-weight: 700; font-size: clamp(110px, 17vw, 220px); line-height: .9; color: var(--ink1); font-variant-numeric: tabular-nums; }
.themes-num .underline { display: block; position: relative; height: 2px; background: var(--ink2); margin: 18px 0 22px; transform-origin: left center; }
.themes-num .cursor-dot2 { position: absolute; top: -3px; left: 0; width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); }
.lx-js .scene .themes-num .underline { transform: scaleX(0); transition: transform .7s cubic-bezier(.16,1,.3,1) .15s; }
.lx-js .scene.is-settled .themes-num .underline, html.qy-reveal .themes-num .underline { transform: scaleX(1); }
.lx-js .scene .themes-num .cursor-dot2 { transition: left .9s cubic-bezier(.16,1,.3,1) .25s; }
.lx-js .scene.is-settled .themes-num .cursor-dot2, html.qy-reveal .themes-num .cursor-dot2 { left: calc(100% - 8px); }
.index { margin-top: clamp(26px, 3vw, 38px); }
.index__row { display: grid; grid-template-columns: 48px 1fr; align-items: baseline; padding: 13px 0; border-bottom: 1px solid var(--line); }
.index__row .no { font-size: 12px; font-weight: 600; color: var(--ink4); font-variant-numeric: tabular-nums; transition: color .2s var(--ease); }
.index__row .dirname { font-family: var(--font-display); font-weight: 700; font-size: clamp(20px, 2.2vw, 28px); color: var(--ink1); }
.index__row:hover .no { color: var(--cyan); }
.index__row:hover { border-bottom-color: var(--ink3); }
#themes .chips { margin-top: 26px; gap: 10px 12px; }
/* 071726 雇主: chips "重叠"——病根是 .lx-reveal 的 blur(9px)+位移在快速滚过时
   把小 chip 糊成叠影; 小元素群豁免重揭示, 只留纯淡入 */
#themes .chips .lx-reveal, #themes .index .lx-reveal { transform: none !important; filter: none !important; }
@media (max-width: 900px) { .themes-split { grid-template-columns: 1fr; gap: 30px; } .display-num { font-size: 96px; } }

/* ============ audience/final 收尾(PLAN-scenes 批7) ============ */
.reg-chip--sm { padding: 5px 12px; font-size: 10px; gap: 8px; }
/* 双档案板: 5/7 主次 + 接触影入绘图桌 */
#audience .aud { grid-template-columns: 5fr 7fr; }
.aud .panel { position: relative; overflow: visible; }
.aud .panel::after {
  content: ""; position: absolute; left: 50%; bottom: -9px; width: 76%; height: 14px;
  transform: translateX(-50%);
  background: radial-gradient(50% 50% at 50% 50%, rgba(11,24,39,.13), transparent 72%);
  pointer-events: none;
}
/* 签名印记: 五同心圆由内向外 draw-in(settle 驱动), 阶段色点随环上电 */
.final__seal { width: min(300px, 52%); height: auto; display: block; margin: 0 auto 8px; }
.final__seal .seal-r { stroke-dashoffset: 0; }
.lx-js .final__seal .seal-r { stroke-dasharray: 1; stroke-dashoffset: 1; transition: stroke-dashoffset .6s cubic-bezier(.16,1,.3,1); }
.lx-js .final__seal .seal-r:nth-child(2) { transition-delay: .12s; }
.lx-js .final__seal .seal-r:nth-child(3) { transition-delay: .24s; }
.lx-js .final__seal .seal-r:nth-child(4) { transition-delay: .36s; }
.lx-js .final__seal .seal-r:nth-child(5) { transition-delay: .48s; }
.lx-js .scene.is-settled .final__seal .seal-r, html.qy-reveal .final__seal .seal-r { stroke-dashoffset: 0; }
.lx-js .final__seal .seal-d { opacity: 0; transform: scale(1.3); transform-origin: center; transform-box: fill-box; transition: opacity .25s var(--ease), transform .25s cubic-bezier(.34,1.6,.64,1); }
.lx-js .final__seal .seal-d:nth-child(1) { transition-delay: .55s; }
.lx-js .final__seal .seal-d:nth-child(2) { transition-delay: .67s; }
.lx-js .final__seal .seal-d:nth-child(3) { transition-delay: .79s; }
.lx-js .final__seal .seal-d:nth-child(4) { transition-delay: .91s; }
.lx-js .final__seal .seal-d:nth-child(5) { transition-delay: 1.03s; }
.lx-js .scene.is-settled .final__seal .seal-d, html.qy-reveal .final__seal .seal-d { opacity: 1; transform: scale(1); }
@media (prefers-reduced-motion: reduce) {
  .lx-js .final__seal .seal-r { stroke-dashoffset: 0; transition: none; }
  .lx-js .final__seal .seal-d { opacity: 1; transform: none; transition: none; }
}

/* 071726 审查保险网: 窄屏与 reduce 下所有 settle 门控直接放行(io2 已出闸,
   此处 belt-and-braces——任何路径都不许把内容锁在隐藏态) */
@media (max-width: 760px) {
  #audience .aud { grid-template-columns: 1fr; }
  .lx-js .scene .ln > span { transform: none; }
  .lx-js .scene .reg-chip { opacity: 1; transform: none; }
  .lx-js .scene .reg-chip::after { transform: none; }
  .lx-js .scene .split__stack .qy-card, .lx-js .scene .bento .qy-card { opacity: 1; transform: none; }
  .lx-js .scene .split__stack .qy-card::after { transform: translateX(-50%) scaleX(1); }
  .lx-js .scene--blueprint .stage { opacity: 1; transform: none; }
  .lx-js .scene .themes-num .underline { transform: none; }
  .lx-js .scene .themes-num .cursor-dot2 { left: calc(100% - 8px); }
  .lx-js .final__seal .seal-r { stroke-dashoffset: 0; }
  .lx-js .final__seal .seal-d { opacity: 1; transform: none; }
}
@media (prefers-reduced-motion: reduce) {
  html:not(.lx-js) { scroll-snap-type: none; }
  .lx-js .scene .themes-num .underline { transform: none; transition: none; }
  .lx-js .scene .themes-num .cursor-dot2 { left: calc(100% - 8px); transition: none; }
}

/* ============ 批C1 纸幕叠场(电影 cover-cut, 绘图桌"一张纸盖一张纸") ============ */
/* under = 滚到位后钉住等待被盖(sticky 是滚动几何, 非动画——reduce 下照常成立,
   但为稳妥窄屏关闭); cover = 盖上来的新纸: 必须不透明 + 顶缘投纸影。 */
@media (min-width: 761px) {
  .scene--under { position: sticky; top: 0; }
  /* 071726 渲染不稳定修复: 大模糊 box-shadow 滚动重绘代价高 → 顶缘渐变纸影 */
  .scene--cover::after { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 26px; z-index: 2; pointer-events: none;
    background: linear-gradient(to bottom, rgba(11,24,39,.14), transparent); }
  .scene--cover:not(.scene--band):not(.scene--blueprint) { background: var(--canvas); }
  /* 批C2 showpiece: 白纸→制图负片的盖场——藏蓝纸自下而上盖过 produce,
     顶缘一道负片青刃边 + 更重的纸影(全页唯一一次"硬切"级转场) */
  .scene--blueprint.scene--cover { border-top: 2px solid var(--cyan-neg, #6FD1FF); }
  .scene--blueprint.scene--cover::after { height: 34px; background: linear-gradient(to bottom, rgba(4,10,18,.30), transparent); }
  /* 被盖时的景深退场(GSAP scrub 驱动 transform/opacity, JS 缺席则纯 sticky 无损) */
  .scene--under { transform-origin: 50% 30%; }
}

/* 吸附到位的顿挫脉冲(浑天仪合体卡扣同语) */
.scene.is-settled > .wrap { animation: scene-settle .32s cubic-bezier(.34,1.6,.64,1); }
@keyframes scene-settle { from { transform: translateY(4px); } to { transform: translateY(0); } }
@media (max-width: 760px) { .scene { min-height: auto; } .scene > .wrap { padding-block: 88px; } }
@media (prefers-reduced-motion: reduce) { .scene.is-settled > .wrap { animation: none; } }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: var(--t-label); font-weight: 500;
  text-transform: uppercase; letter-spacing: .22em; color: var(--cyan); }
.eyebrow::before { content: ""; width: 22px; height: 1px; background: currentColor; opacity: .6; }
.eyebrow--center { justify-content: center; }
.eyebrow__no { font-variant-numeric: tabular-nums; letter-spacing: .05em; opacity: .9; }
.eyebrow--num::before { display: none; }
.eyebrow--num .eyebrow__no { margin-right: 12px; padding-right: 12px; border-right: 1px solid currentColor; }

/* film grain — subtle tactile texture over the whole page (agency finish) */
/* two-layer material: fine film grain (140px, high-freq) + paper-fibre wash
   (640px, low-freq turbulence) so the flat gray reads as stock, not screen.
   multiply blend carries the texture onto the white chapter bands too. */
.grain { position: fixed; inset: 0; z-index: 90; pointer-events: none; opacity: .06; mix-blend-mode: multiply;
  background-image:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.8'/%3E%3C/svg%3E"),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='640' height='640'%3E%3Cfilter id='p'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.012' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23p)' opacity='0.9'/%3E%3C/svg%3E");
  background-size: 140px 140px, 640px 640px; }
.gsap-on .grain { animation: grain 6s steps(6) infinite; }
@keyframes grain {
  0%   { background-position: 0 0; }      20% { background-position: -30px 12px; }
  40%  { background-position: 18px -24px; } 60% { background-position: -14px 20px; }
  80%  { background-position: 24px 8px; }  100% { background-position: 0 0; }
}
@media (prefers-reduced-motion: reduce) { .grain { animation: none !important; } }

.h2 { font-family: var(--font-display); font-weight: 700; line-height: 1.1; color: var(--ink1);
  font-size: clamp(30px, 3.8vw, 50px); letter-spacing: -.012em; }
.sub { font-size: var(--t-lead); line-height: 1.65; color: var(--ink2); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #C2CDE0; border-radius: 999px; border: 3px solid var(--canvas); }
::-webkit-scrollbar-track { background: transparent; }

/* ======================= CUSTOM CURSOR ======================= */
.cursor, .cursor-dot { display: none; }
@media (hover: hover) and (pointer: fine) {
  body.has-cursor { cursor: none; }
  body.has-cursor a, body.has-cursor button, body.has-cursor [data-cursor] { cursor: none; }
  .cursor { display: block; position: fixed; top: 0; left: 0; width: 32px; height: 32px; z-index: 300;
    border: 1.5px solid rgba(var(--cyan-rgb), .55); border-radius: 50%; transform: translate(-50%, -50%);
    pointer-events: none; will-change: transform, width, height;
    transition: width .25s var(--ease), height .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease), opacity .25s var(--ease); }
  .cursor.is-hover { width: 54px; height: 54px; background: rgba(var(--cyan-rgb), .07); border-color: rgba(var(--cyan-rgb), .7); }
  .cursor.is-down { width: 26px; height: 26px; }
  .cursor-dot { display: block; position: fixed; top: 0; left: 0; width: 5px; height: 5px; z-index: 301;
    background: var(--cyan); border-radius: 50%; transform: translate(-50%, -50%); pointer-events: none; will-change: transform; }
}

/* ============================ NAV ============================ */
.nav { position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease); border-bottom: 1px solid transparent; }
.nav.scrolled { background: rgba(251,252,254,.82); -webkit-backdrop-filter: blur(16px) saturate(1.15);
  backdrop-filter: blur(16px) saturate(1.15); border-bottom-color: var(--line); box-shadow: 0 1px 0 rgba(11,24,39,.02); }
.nav__row { height: 68px; display: flex; align-items: center; justify-content: space-between; }
.nav__brand { display: flex; align-items: center; gap: 12px; }
/* multiply drops the mark's white box on any light surface = true transparency */
.nav__brand img { height: 44px; width: auto; mix-blend-mode: multiply; }
/* rotating direction slot — replaces the static wordmark next to the logo */
.nav__rot { display: inline-flex; align-items: center; font-size: var(--t-label); font-weight: 600;
  letter-spacing: .18em; text-transform: uppercase; color: var(--cyan-deep); }
.nav__rot-clip { display: inline-flex; height: 16px; align-items: center; overflow: hidden; min-width: 108px; }
.nav__rot-clip span { display: inline-block; white-space: nowrap; }
.nav__links { display: flex; gap: 34px; }
.nav__links a { color: var(--ink2); font-weight: 500; transition: color .15s var(--ease); position: relative; }
.nav__links a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 1.5px; background: var(--cyan); transition: right .3s var(--ease); }
.nav__links a:hover { color: var(--cyan); } .nav__links a:hover::after { right: 0; }
.nav__progress { height: 2px; background: linear-gradient(90deg, var(--cyan), var(--institution-hi)); transform: scaleX(0); transform-origin: left; }

.btn { display: inline-flex; align-items: center; gap: 8px; border-radius: 999px; font-family: var(--font-body);
  font-weight: 500; cursor: pointer; white-space: nowrap;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease); }
.btn--cyan { background: var(--cyan); color: #fff; }
.btn--cyan:hover { background: var(--cyan-deep); transform: translateY(-2px); }
.btn--ghost { color: var(--ink1); border: 1px solid var(--line); background: var(--overlay); }
.btn--ghost:hover { border-color: rgba(var(--cyan-rgb), .5); color: var(--cyan); transform: translateY(-2px); }
.btn .arw { transition: transform .18s var(--ease); }
.btn:hover .arw { transform: translateX(4px); }
.btn--sm { padding: 9px 18px; font-size: var(--t-body); }
.btn--lg { padding: 15px 28px; font-size: var(--t-lead); }
.btn--glow { box-shadow: var(--sh-cyan); }
.btn--glow:hover { box-shadow: 0 16px 36px rgba(var(--cyan-rgb), .36); }

/* ============================ HERO (fullscreen) ============================ */
.hero { position: relative; min-height: 100svh; display: flex; align-items: center; overflow: hidden; padding: 120px 0 90px; }
.hero__layers { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.layer { position: absolute; will-change: transform; }
.layer--grid { inset: -12%; background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 54px 54px; opacity: .5;
  -webkit-mask-image: radial-gradient(120% 90% at 76% 20%, #000 0%, transparent 60%);
  mask-image: radial-gradient(120% 90% at 76% 20%, #000 0%, transparent 60%); }
/* mesh kept quiet (.5): the canvas must stay "paper white with quality" so the
   ink text ramp (ink1–ink4) keeps its design-system contrast. */
.layer--mesh { inset: -16%; width: 132%; height: 132%; filter: blur(64px) saturate(1.1); opacity: .38; }
.layer--net { inset: 0; width: 100%; height: 100%; opacity: .9; }
.layer--orb { border-radius: 50%; filter: blur(8px); }
.orb--1 { width: 680px; height: 680px; right: -160px; top: -160px; background: radial-gradient(closest-side, rgba(var(--cyan-rgb), .12), transparent 70%); }
.orb--2 { width: 560px; height: 560px; left: -200px; bottom: -220px; background: radial-gradient(closest-side, rgba(28,82,127,.10), transparent 70%); }
.hero__inner { position: relative; z-index: 1; width: 100%; display: flex; flex-direction: column; justify-content: center; gap: clamp(28px, 3vw, 40px); }
.hero__top { max-width: 100%; }
.hero__bottom { display: grid; grid-template-columns: 1fr .92fr; gap: clamp(32px, 4vw, 56px); align-items: center; }
.hero__lead { max-width: 560px; }

.hero__brandrow { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.hero__mark { position: relative; display: inline-flex; align-items: center; justify-content: center; height: 44px; width: 44px;
  border-radius: 12px; background: var(--ink1); box-shadow: var(--sh-2); }
.hero__mark img { height: 26px; width: auto; }
.hero__brush { position: absolute; bottom: -3px; left: 8px; height: 7px; width: 30px; }
.hero__divider { width: 1px; height: 18px; background: var(--line); }
.hero__eyebrow { color: var(--cyan); font-size: var(--t-label); font-weight: 600; text-transform: uppercase; letter-spacing: .2em; }
.hero__rot { display: inline-flex; height: 16px; align-items: center; overflow: hidden; min-width: 96px; vertical-align: middle; }
.hero__rot span { display: inline-block; }

/* CJK display type: neutral tracking (negative tracking crowds hanzi),
   breathing line-height, hairline offset between the two lines. */
.hero__title { font-family: var(--font-display); font-weight: 700; letter-spacing: .005em; line-height: 1.18;
  font-size: clamp(42px, 5.6vw, 82px); color: var(--ink1); }
.hero__title .ln { display: block; overflow: hidden; padding-bottom: .06em; }
.hero__title .ln + .ln { margin-top: .02em; }
.hero__title .ln > span { display: block; }
.hero__title .accent { color: var(--cyan); font-style: normal; position: relative; white-space: nowrap; }
.hero__title .accent::after { content: ""; position: absolute; left: 0; right: 0; bottom: .06em; height: .14em; background: rgba(var(--cyan-rgb), .18); border-radius: 3px; z-index: -1; }
/* line-mask reveal via CSS transition (robust; GSAP toggles .is-in) */
.gsap-on .hero__title .ln > span { transform: translateY(110%); transition: transform 1s var(--ease); }
.gsap-on .hero__title.is-in .ln > span { transform: translateY(0); }
.gsap-on .hero__title .ln:nth-child(1) > span { transition-delay: .15s; }
.gsap-on .hero__title .ln:nth-child(2) > span { transition-delay: .30s; }

.hero__sub { margin-top: 26px; max-width: 540px; color: var(--ink1); }
.hero__ctas { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px; }
.hero__meta { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 18px; color: var(--ink2); font-size: var(--t-body); font-weight: 500; }
.hero__meta span { display: inline-flex; align-items: center; gap: 7px; }
.hero__meta .tick { width: 15px; height: 15px; color: var(--cyan); flex: none; }

.hero__scroll { position: absolute; left: 50%; bottom: 30px; transform: translateX(-50%); z-index: 2;
  display: inline-flex; flex-direction: column; align-items: center; gap: 10px; color: var(--ink4);
  font-size: 10px; letter-spacing: .3em; font-weight: 500; }
.hero__scroll-rail { width: 22px; height: 34px; border: 1px solid var(--ink4); border-radius: 999px; display: flex; justify-content: center; padding-top: 6px; }
.hero__scroll-dot { width: 4px; height: 6px; border-radius: 999px; background: var(--cyan); animation: hint 1.8s infinite ease-in-out; }
@keyframes hint { 0%,100% { transform: translateY(0); opacity: 1; } 50% { transform: translateY(8px); opacity: .4; } }

/* hero artifact card */
.hero__art { position: relative; height: 100%; min-height: 420px; }
.art-card { position: absolute; border-radius: 20px; background: var(--surface); border: 1px solid var(--line-soft); }
.art-card--back { inset: 34px -10px 34px 44px; background: var(--canvas-2); box-shadow: var(--sh-1); transform: rotate(3deg); }
.art-card--front { inset: 6px 24px 6px 0; box-shadow: var(--sh-3); padding: 24px; display: flex; flex-direction: column;
  overflow: hidden; transform-style: preserve-3d; }
.art__head { display: flex; align-items: center; gap: 8px; font-size: var(--t-label); color: var(--ink3); }
.art__head .d { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 3px rgba(var(--cyan-rgb), .14); }
.art__chip { margin-left: auto; padding: 3px 10px; border-radius: 999px; font-size: 11px; font-weight: 500; color: var(--cyan-deep); background: rgba(var(--cyan-rgb), .10); }
.art__title { margin-top: 16px; font-family: var(--font-display); font-weight: 700; font-size: 20px; line-height: 1.3; color: var(--ink1); }
.art__lines { margin-top: 14px; display: flex; flex-direction: column; gap: 8px; }
.art__lines i { height: 8px; border-radius: 4px; background: var(--muted); display: block; }
.art__lines i:nth-child(1) { width: 100%; } .art__lines i:nth-child(2) { width: 92%; } .art__lines i:nth-child(3) { width: 74%; }
.art__chart { margin-top: 18px; border-radius: 12px; background: var(--canvas-2); border: 1px solid var(--line-soft); padding: 12px; }
.art__chart svg { width: 100%; height: auto; display: block; }
.art__foot { margin-top: 16px; padding-top: 14px; border-top: 1px solid var(--line-soft); display: flex; gap: 16px; font-size: var(--t-label); color: var(--ink3); }
.art__foot b { color: var(--ink1); font-weight: 600; } .art__foot .sep { color: var(--line); }
.art__badge { position: absolute; z-index: 3; background: var(--overlay); border: 1px solid var(--line); box-shadow: var(--sh-2);
  border-radius: 12px; padding: 8px 12px; display: flex; align-items: center; gap: 8px; font-size: var(--t-label); font-weight: 500; color: var(--ink1); will-change: transform; }
.art__badge svg { width: 16px; height: 16px; color: var(--cyan); }
.art__badge--tl { left: -16px; top: -16px; }
.art__badge--br { right: 6px; bottom: 34px; }

/* VanillaTilt glare rounding */
.js-tilt-glare { border-radius: inherit; }

/* ============ MARGIN WATERMARKS — faint side ornaments ============
   Big, very quiet blueprint marks that fill the side whitespace so long
   sections never feel empty. Ink-line language, opacity .05–.07. */
.wm { position: absolute; pointer-events: none; z-index: 0; color: var(--ink3); opacity: .13; will-change: transform; }
/* alive, not rigid: outer div rides GSAP scroll-parallax; the svg itself
   breathes on a slow independent drift (per-mark phase via --wmd) */
.wm svg { width: 100%; height: 100%; display: block;
  animation: wm-roam var(--wmd, 15s) ease-in-out infinite; will-change: transform; }
/* full-field roam: a wide lissajous-like loop (--rx/--ry set per mark, inward
   from its anchored side). Sections clip overflow, so wandering off-edge is
   safe. Calm easing, whisper rotation: it drifts, it never bounces. */
@keyframes wm-roam {
  0%, 100% { transform: translate3d(0, 0, 0) rotate(0deg); }
  25%      { transform: translate3d(var(--rx, 240px), calc(var(--ry, 160px) * -0.55), 0) rotate(1.8deg); }
  50%      { transform: translate3d(calc(var(--rx, 240px) * 0.45), var(--ry, 160px), 0) rotate(-1.4deg); }
  75%      { transform: translate3d(calc(var(--rx, 240px) * -0.35), calc(var(--ry, 160px) * 0.4), 0) rotate(1deg); }
}
@media (prefers-reduced-motion: reduce) { .wm svg { animation: none !important; } }
.section, .faculty { position: relative; overflow: hidden; }
.section > .wrap, .faculty > .wrap { position: relative; z-index: 1; }

/* ==================== FACULTY (credibility band) ==================== */
/* Apple-style "chapter" band: solid near-white surface breaks the canvas,
   centered editorial type, school names as typographic wordmarks (no seals). */
.faculty { background: var(--surface); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft);
  padding: clamp(150px, 16vh, 200px) 0; text-align: center; }
.faculty__line { margin-top: 22px; font-family: var(--font-display); font-weight: 700; line-height: 1.22;
  letter-spacing: .005em; font-size: clamp(24px, 3vw, 42px); color: var(--ink1); }
.faculty__schools { margin-top: 52px; display: flex; align-items: center; justify-content: center; gap: clamp(28px, 5vw, 72px); }
.school { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.school b { font-family: var(--font-display); font-weight: 700; letter-spacing: .12em;
  font-size: clamp(22px, 2.6vw, 36px); color: var(--institution); }
.school span { font-size: var(--t-label); letter-spacing: .2em; color: var(--ink4); }
.faculty__sep { width: 1px; height: 44px; background: var(--line); }
.faculty__note { margin: 44px auto 0; max-width: 480px; font-size: var(--t-body); color: var(--ink3); }

/* ==================== MANIFESTO (fullscreen) ==================== */
/* (.manifesto 系列已裁 — 071626 查重刀1) */

/* (.cine/.explode/.xl 系列已裁 — 071626 查重刀2) */

/* ==================== PRODUCE (what you'll make) ==================== */
/* white chapter band (pairs with .faculty — the two credibility chapters) */
#produce { background: var(--surface); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); position: relative; }
#produce .pcard { background: var(--canvas-2); }
.produce { margin-top: clamp(42px, 4vw, 56px); display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(14px, 1.4vw, 20px); }
.pcard { height: 100%; display: flex; flex-direction: column; align-items: flex-start; gap: 10px;
  border: 1px solid var(--line-soft); border-radius: 20px; padding: clamp(22px, 2vw, 28px); background: var(--surface);
  box-shadow: var(--sh-1); transform-style: preserve-3d;
  transition: box-shadow .25s var(--ease), border-color .25s var(--ease); }
.pcard:hover { box-shadow: var(--sh-3); border-color: rgba(var(--cyan-rgb), .28); }
.pcard__viz { width: 100%; padding: 10px 0 6px; transform: translateZ(26px); }
.pcard__viz svg { width: 100%; height: 118px; display: block; }
.pcard b { font-family: var(--font-display); font-weight: 700; font-size: var(--t-section); color: var(--ink1); }
.pcard p { font-size: var(--t-body); line-height: 1.6; color: var(--ink2); }
/* hover micro-animations inside the produce vignettes: the title bar sweeps,
   checks/sparklines redraw. Pure CSS, pathLength=1 normalised dashes. */
.pcard .pv-sweep { transform-origin: 42px 24px; }
.pcard:hover .pv-sweep { animation: pv-sweep .7s var(--ease); }
@keyframes pv-sweep { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.pcard .pv-draw { stroke-dasharray: 1; stroke-dashoffset: 0; }
.pcard:hover .pv-draw { animation: pv-draw .8s var(--ease); }
@keyframes pv-draw { from { stroke-dashoffset: 1; } to { stroke-dashoffset: 0; } }
/* hero artifact card: sparkline redraws on hover (same grammar) */
.art-card--front .art__spark { stroke-dasharray: 1; stroke-dashoffset: 0; }
.art-card--front:hover .art__spark { animation: pv-draw 1s var(--ease); }
@media (prefers-reduced-motion: reduce) {
  .pcard:hover .pv-sweep, .pcard:hover .pv-draw, .art-card--front:hover .art__spark { animation: none; }
}

/* format benchmarks — ghost type (standards we polish against, not promises) */
.confs { margin-top: 64px; text-align: center; }
.confs__note { font-size: var(--t-label); font-weight: 500; letter-spacing: .18em; color: var(--ink4); text-transform: uppercase; }
.confs__row { margin-top: 18px; display: flex; flex-wrap: wrap; justify-content: center; align-items: baseline; gap: 10px 34px; }
.confs__row span { font-family: var(--font-display); font-weight: 700; font-size: clamp(20px, 2.4vw, 34px);
  letter-spacing: .02em; color: transparent; -webkit-text-stroke: 1px var(--ink4); }
.confs__row span:hover { color: var(--cyan); -webkit-text-stroke: 0; transition: color .2s var(--ease); }
.confs__row i { color: var(--line); font-style: normal; }

/* ============== WIREFRAME GEOMETRY (CSS 3D, slow spin) ============== */
.geo { position: absolute; z-index: 0; pointer-events: none; transform-style: preserve-3d; }
.gsap-on .geo--cube { animation: geo-spin 34s linear infinite; }
.gsap-on .geo--gyro { animation: geo-spin 46s linear infinite reverse; }
.geo--cube { width: 84px; height: 84px; }
.geo--cube i { position: absolute; inset: 0; border: 1.5px solid rgba(var(--cyan-rgb), .30);
  background: rgba(var(--cyan-rgb), .025); }
.geo--cube i:nth-child(1) { transform: translateZ(42px); }
.geo--cube i:nth-child(2) { transform: rotateY(180deg) translateZ(42px); }
.geo--cube i:nth-child(3) { transform: rotateY(90deg) translateZ(42px); }
.geo--cube i:nth-child(4) { transform: rotateY(-90deg) translateZ(42px); }
.geo--cube i:nth-child(5) { transform: rotateX(90deg) translateZ(42px); }
.geo--cube i:nth-child(6) { transform: rotateX(-90deg) translateZ(42px); }
.geo--sm { width: 56px; height: 56px; opacity: .8; }
.geo--sm i:nth-child(1) { transform: translateZ(28px); }
.geo--sm i:nth-child(2) { transform: rotateY(180deg) translateZ(28px); }
.geo--sm i:nth-child(3) { transform: rotateY(90deg) translateZ(28px); }
.geo--sm i:nth-child(4) { transform: rotateY(-90deg) translateZ(28px); }
.geo--sm i:nth-child(5) { transform: rotateX(90deg) translateZ(28px); }
.geo--sm i:nth-child(6) { transform: rotateX(-90deg) translateZ(28px); }
.geo--gyro { width: 128px; height: 128px; }
.geo--sm2 { width: 84px; height: 84px; opacity: .75; }
.geo--gyro i { position: absolute; inset: 0; border: 1.5px solid rgba(59, 84, 112, .32); border-radius: 50%; }
.geo--gyro i:nth-child(2) { transform: rotateY(62deg); border-color: rgba(var(--cyan-rgb), .30); }
.geo--gyro i:nth-child(3) { transform: rotateY(124deg); border-color: rgba(59, 84, 112, .20); }
.geo--gyro b { position: absolute; left: 50%; top: 50%; width: 7px; height: 7px; border-radius: 50%;
  background: var(--cyan); transform: translate(-50%, -50%); box-shadow: 0 0 0 4px rgba(var(--cyan-rgb), .14); }
@keyframes geo-spin { from { transform: rotateX(-16deg) rotateY(0); } to { transform: rotateX(-16deg) rotateY(360deg); } }
@media (prefers-reduced-motion: reduce) { .geo { animation: none !important; } }

/* ======================== PIPELINE SPINE ===================== */
.pipe__grid { margin-top: 84px; position: relative; display: grid; grid-template-columns: repeat(6, 1fr); gap: 24px; }
.pipe__svg { position: absolute; left: 0; right: 0; top: 10px; width: 100%; height: 8px; overflow: visible; z-index: 0; }
.pipe__base { stroke: var(--line); stroke-width: 2; fill: none; }
.pipe__draw { stroke: var(--cyan); stroke-width: 2.5; fill: none; }
.stage { position: relative; display: flex; flex-direction: column; z-index: 1; }
.stage__dot { position: relative; z-index: 1; margin-bottom: 24px; width: 22px; height: 22px; border-radius: 50%;
  background: var(--surface); border: 2px solid var(--line); display: flex; align-items: center; justify-content: center; box-shadow: 0 0 0 5px var(--canvas); }
.stage__dot i { width: 8px; height: 8px; border-radius: 50%; background: var(--institution-hi); }
.stage:first-child .stage__dot { border-color: var(--cyan); box-shadow: 0 0 0 5px var(--canvas), 0 6px 14px rgba(var(--cyan-rgb), .22); }
.stage:first-child .stage__dot i { background: var(--cyan); }
.stage__pic { width: 44px; height: 44px; margin-bottom: 14px; }
.stage__meta { display: flex; align-items: baseline; gap: 8px; }
.stage__no { font-size: var(--t-body); color: var(--ink4); font-variant-numeric: tabular-nums; font-weight: 500; }
.stage__en { font-size: var(--t-label); text-transform: uppercase; letter-spacing: .16em; color: var(--cyan); font-weight: 600; }
.stage__cn { margin-top: 6px; font-family: var(--font-display); font-weight: 700; font-size: 23px; color: var(--ink1); }
.stage__desc { margin-top: 8px; font-size: var(--t-body); line-height: 1.6; color: var(--ink2); }
.pipe__mobile { display: none; }

/* ============================ STATS ========================== */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(28px, 3vw, 40px) 24px; border: 1px solid var(--line-soft);
  border-radius: 26px; padding: clamp(34px, 3.6vw, 52px); background: var(--surface); box-shadow: var(--sh-2); }
.stat { display: flex; flex-direction: column; align-items: center; text-align: center; }
.stat__n { font-family: var(--font-display); font-weight: 700; line-height: 1; color: var(--ink1); font-size: clamp(42px, 5vw, 62px); display: flex; align-items: baseline; }
.stat__n .num { font-variant-numeric: tabular-nums; } .stat__n .suf { color: var(--cyan); }
.stat__l { margin-top: 14px; font-size: var(--t-body); color: var(--ink3); }

/* ============================ FEATURES ======================= */
/* (旧 .bento 3列模板已退役 — PLAN-scenes 批5 错落阵接管, 规则在场景系统区) */
.card { position: relative; overflow: hidden; height: 100%; border: 1px solid var(--line-soft); border-radius: 20px; padding: clamp(24px, 2.2vw, 32px);
  background: var(--surface); box-shadow: var(--sh-1); transform-style: preserve-3d;
  transition: box-shadow .25s var(--ease), border-color .25s var(--ease); }
.card:hover { box-shadow: var(--sh-3); border-color: rgba(var(--cyan-rgb), .28); }
.card--wide { grid-column: span 2; }
.card__ic { width: 46px; height: 46px; border-radius: 13px; display: flex; align-items: center; justify-content: center;
  background: rgba(var(--cyan-rgb), .09); color: var(--cyan); margin-bottom: 20px; transform: translateZ(30px); }
.card__ic svg { width: 24px; height: 24px; }
/* bespoke illustrated scene at the top of each feature card */
.card--viz { padding-top: 0; }
.card__viz { margin: 0 -32px 22px; padding: 22px 26px 12px; border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, #F2F7FC, rgba(242,247,252,0)); transform: translateZ(24px); }
.card__viz img { width: 100%; height: 150px; object-fit: contain; display: block; }
.card--wide .card__viz img { height: 160px; }
/* measure discipline: cap the line length inside the wide cell (skill `line-length`) */
.card--wide p { max-width: 520px; }

.card__tick { position: absolute; right: 26px; top: 26px; width: 16px; height: 16px; opacity: 0;
  border-top: 1.5px solid var(--cyan); border-right: 1.5px solid var(--cyan); transition: opacity .2s var(--ease); }
.card:hover .card__tick { opacity: 1; }
.card h3 { font-family: var(--font-display); font-weight: 700; font-size: var(--t-section); color: var(--ink1); transform: translateZ(20px); }
.card p { margin-top: 12px; font-size: var(--t-body); line-height: 1.6; color: var(--ink2); }

/* ============================ THEMES ========================= */
.dirs { margin-top: 52px; display: flex; flex-wrap: wrap; gap: 12px; }
.dir { display: inline-flex; align-items: center; gap: 9px; padding: 11px 20px; border-radius: 999px; font-size: var(--t-lead); font-weight: 600;
  color: var(--cyan-deep); background: rgba(var(--cyan-rgb), .07); border: 1px solid rgba(var(--cyan-rgb), .24); box-shadow: var(--sh-1);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease); }
.dir:hover { transform: translateY(-2px); box-shadow: var(--sh-2); }
.chips { margin-top: 22px; display: flex; flex-wrap: wrap; gap: 10px; }
.chip { padding: 9px 18px; border-radius: 999px; font-size: var(--t-body); color: var(--ink2); background: var(--surface); border: 1px solid var(--line);
  transition: border-color .15s var(--ease), color .15s var(--ease), box-shadow .15s var(--ease), transform .15s var(--ease); }
.chip:hover { border-color: rgba(var(--cyan-rgb), .5); color: var(--cyan); box-shadow: var(--sh-1); transform: translateY(-2px); }
.chip--more { border: none; color: var(--ink4); background: transparent; }

/* ============================ AUDIENCE ======================= */
.aud { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.panel { position: relative; overflow: hidden; height: 100%; display: flex; flex-direction: column; border-radius: 26px; padding: clamp(30px, 3vw, 44px);
  border: 1px solid var(--line-soft); background: var(--surface); box-shadow: var(--sh-2); transform-style: preserve-3d; }
.panel--hl { background: linear-gradient(160deg, #F4F9FC, var(--surface)); border-color: rgba(var(--cyan-rgb), .22); }
.panel__viz { margin: -44px -44px 26px; padding: 26px 34px 16px; border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, #F2F7FC, rgba(242,247,252,0)); }
.panel__viz img { width: 100%; height: 170px; object-fit: contain; display: block; }
.panel__tag { align-self: flex-start; padding: 5px 14px; border-radius: 999px; font-size: var(--t-label); font-weight: 600; text-transform: uppercase; letter-spacing: .16em; color: var(--cyan-deep); background: rgba(var(--cyan-rgb), .10); }
.panel h3 { margin-top: 22px; font-family: var(--font-display); font-weight: 700; line-height: 1.2; font-size: clamp(23px, 2.4vw, 30px); color: var(--ink1); }
.panel p { margin-top: 14px; font-size: var(--t-body); line-height: 1.65; color: var(--ink2); }
.panel ul { margin-top: 26px; list-style: none; display: flex; flex-direction: column; gap: 14px; }
.panel li { display: flex; align-items: center; gap: 12px; font-size: var(--t-body); color: var(--ink1); }
.panel li .ck { flex: none; width: 22px; height: 22px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; color: var(--cyan); background: rgba(var(--cyan-rgb), .12); }
.panel li .ck svg { width: 13px; height: 13px; }

/* ==================== FINAL CTA (fullscreen) ==================== */
.final-sec { min-height: 100svh; display: flex; align-items: center; padding: 120px 0; }
.final-sec .wrap { width: 100%; }
.final { position: relative; overflow: hidden; border-radius: 30px; padding: 108px 28px; text-align: center; border: 1px solid rgba(28,82,127,.14);
  background: radial-gradient(120% 120% at 50% 0%, #D6E6F3 0%, #E9F1F9 46%, var(--surface) 100%); box-shadow: var(--sh-3); }
.final__grid { position: absolute; inset: 0; opacity: .7; pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(75% 80% at 50% 30%, #000, transparent); mask-image: radial-gradient(75% 80% at 50% 30%, #000, transparent); }
.final__inner { position: relative; }
.final__journey { width: min(640px, 86%); margin: 0 auto 34px; display: block; }
.final h2 { max-width: 660px; margin: 0 auto; font-family: var(--font-display); font-weight: 700; line-height: 1.12; font-size: clamp(30px, 4.4vw, 52px); color: var(--ink1); letter-spacing: -.01em; }
.final p { max-width: 560px; margin: 18px auto 0; }
.final .btn { margin-top: 38px; }
.final__note { margin-top: 18px; font-size: var(--t-label); color: var(--ink4); }
.final__note a { color: var(--cyan-deep); border-bottom: 1px solid rgba(var(--cyan-rgb), .35); padding-bottom: 1px; }

/* ============================ FOOTER ========================= */
/* footer texture: blueprint dot-grid over the warm gray (engineering-paper
   finish; the global grain layer adds fibre on top) */
.foot { border-top: 1px solid var(--line); background-color: var(--canvas-2);
  background-image: radial-gradient(circle at 1px 1px, rgba(59, 84, 112, .12) 1px, transparent 1.6px);
  background-size: 22px 22px; }
.foot__top { display: flex; flex-wrap: wrap; gap: 32px; justify-content: space-between; align-items: flex-start; padding: 60px 0 40px; }
.foot__brand { max-width: 360px; }
.foot__brand .row { display: flex; align-items: center; gap: 10px; }
.foot__brand img { height: 30px; width: auto; mix-blend-mode: multiply; }
.foot__brand .row span { font-weight: 700; font-family: var(--font-display); color: var(--ink1); }
.foot__brand p { margin-top: 16px; color: var(--ink3); }
.foot__contact { margin-top: 20px; display: flex; flex-direction: column; gap: 9px; font-size: var(--t-body); }
.foot__contact a, .foot__contact span { display: inline-flex; align-items: center; gap: 9px; color: var(--ink2); }
.foot__contact svg { width: 16px; height: 16px; color: var(--cyan-deep); flex: none; }
.foot__contact a { font-variant-numeric: tabular-nums; transition: color .15s var(--ease); }
.foot__contact a:hover { color: var(--cyan); }
.foot__nav { display: flex; flex-wrap: wrap; gap: 12px 40px; }
.foot__nav a { color: var(--ink2); font-weight: 500; transition: color .15s var(--ease); }
.foot__nav a:hover { color: var(--cyan); }
.foot__legal { display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; padding: 24px 0 52px; border-top: 1px solid var(--line); font-size: var(--t-label); color: var(--ink4); }

/* ======================= REVEAL (progressive) ================ */
/* Luxury entrance: rise + settle from a soft blur (framer/21st.dev grammar).
   Filter clears to none at rest so tilt/hover performance is untouched. */
.lx-reveal { opacity: 1; }
.lx-js .lx-reveal { opacity: 0; transform: translateY(26px) scale(.977); filter: blur(9px);
  transition: opacity .9s var(--ease), transform .9s var(--ease), filter .9s var(--ease);
  will-change: opacity, transform, filter; }
.lx-js .lx-reveal.lx-in { opacity: 1; transform: none; filter: none; }
.lx-js .lx-hero { opacity: 0; animation: lx-rise 1s var(--ease) both; }
@keyframes lx-rise { from { opacity: 0; transform: translateY(24px); filter: blur(8px); }
  to { opacity: 1; transform: none; filter: none; } }
.lx-line-y { transform-origin: center top; }
.lx-js .lx-line-y { transform: scaleY(0); transition: transform 1.2s var(--ease); }
.lx-js .lx-line-y.lx-in { transform: scaleY(1); }

@media (prefers-reduced-motion: reduce) {
  .lx-js .lx-reveal, .lx-js .lx-hero, .lx-js .lx-line-y { opacity: 1 !important; transform: none !important; filter: none !important; animation: none !important; transition: none !important; }
  .gsap-on .hero__title .ln > span { opacity: 1 !important; transform: none !important; }
  .hero__scroll-dot, .art__badge { animation: none !important; }
}

/* ============================ RESPONSIVE ===================== */
@media (max-width: 980px) {
  .hero__bottom { grid-template-columns: 1fr; gap: 44px; }
  .hero__art { min-height: 380px; max-width: 460px; }
}
@media (max-width: 760px) {
  .section { padding: 88px 0; }
  .btn { min-height: 48px; }
  .nav__links a, .foot__nav a { padding: 10px 0; }
  .hero { padding: 128px 0 84px; }
  .nav__links { display: none; }
  .hero__sub { max-width: 100%; }
  .stats { grid-template-columns: repeat(2, 1fr); padding: 36px; }
  .produce { grid-template-columns: 1fr; }
  .geo { display: none; }
  .bento { grid-template-columns: 1fr; }
  .card--wide { grid-column: span 1; }
  .aud { grid-template-columns: 1fr; }
  .art__badge--tl { left: -8px; }
  /* exploded teardown: callouts move inside the flow on small screens */
  /* (.xl 移动端规则已随查重刀2裁除 071626) */
  .pipe__grid { display: none; }
  .pipe__mobile { display: grid; gap: 40px; margin-top: 56px; position: relative; padding-left: 40px; }
  .pipe__mobile .rail { position: absolute; left: 10px; top: 10px; bottom: 10px; pointer-events: none; }
  .pipe__mobile .rail .base { height: 100%; width: 2px; background: var(--line); border-radius: 2px; }
  .pipe__mobile .rail .draw { position: absolute; inset: 0; width: 2px; border-radius: 2px; background: linear-gradient(to bottom, var(--cyan), var(--institution-hi)); }
  .pipe__mobile .stage__dot { position: absolute; left: -40px; top: 2px; margin: 0; }
}

/* ---------- 手机窄屏 scale(071726 同事真机反馈 + 8条带真viewport审查) ----------
   h2--xl 桌面 clamp 的 42px 下限在手机上不再缩放(孤行+五行巨块);
   faculty 校名行 22px+字距+固定 gap 恒宽 ~360px, 360 屏贴死两缘。 */
@media (max-width: 760px) {
  .h2--xl { font-size: clamp(22px, 7vw, 42px) !important; } /* 12字行(六个阶段)不折 */
  .faculty__line { font-size: clamp(21px, 6.5vw, 42px) !important; } /* 13字行(由伯克利与斯坦福的研究团队)不折 */
  .school b { font-size: clamp(15px, 5vw, 22px); }
  .faculty__schools { gap: clamp(18px, 4vw, 28px); }
}