/* ============================================================================
   MFM — 官网首页
   暗场 · 电影感 · 极大字号 · 玻璃拟态 · 慢节奏
   ----------------------------------------------------------------------------
   版心 1700px（与产品端一致）。全部为设计 token 驱动，不散落魔法数字。
   ========================================================================== */

/* ----------------------------------------------------------------- 字体 --- */
/* 全部自托管，运行时零外部请求。拉丁用 Inter Tight / Instrument Serif，
   中文用 Noto Sans SC 子集（只为本页用到的字做子集，所以只有几十 KB）。 */
@font-face { font-family: 'Inter Tight'; font-style: normal; font-weight: 100 900;
  src: url('fonts/inter-tight-latin-wght-normal.woff2') format('woff2-variations');
  font-display: swap; }
@font-face { font-family: 'Instrument Serif'; font-style: normal; font-weight: 400;
  src: url('fonts/instrument-serif-latin-400-normal.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: 'Instrument Serif'; font-style: italic; font-weight: 400;
  src: url('fonts/instrument-serif-latin-400-italic.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: 'JetBrains Mono'; font-style: normal; font-weight: 100 800;
  src: url('fonts/jetbrains-mono-latin-wght-normal.woff2') format('woff2-variations');
  font-display: swap; }
@font-face { font-family: 'Noto Sans SC'; font-style: normal; font-weight: 300;
  src: url('fonts/noto-sans-sc-300-subset.woff2') format('woff2'); font-display: swap; }
@font-face { font-family: 'Noto Sans SC'; font-style: normal; font-weight: 400;
  src: url('fonts/noto-sans-sc-400-subset.woff2') format('woff2'); font-display: swap; }

/* ----------------------------------------------------------------- token --- */
:root {
  --ink:        #05070a;
  --ink-2:      #080b11;
  --text:       #eaecf1;
  /* 这两个值是实测反推的，不是拍脑袋：小号等宽标注直接压在会发光的背景上，
     #6f7a8a 在纯黑上也只有 4.64:1，背景一亮就掉到 2.6~4.3 —— 过不了 AA。 */
  --text-2:     #aab5c4;
  --text-3:     #95a1b0;
  --line:       rgba(234, 238, 244, .075);
  --line-2:     rgba(234, 238, 244, .16);
  --accent:     #7fd8ee;
  --accent-dim: rgba(127, 216, 238, .55);

  --sans:  'Inter Tight', 'Noto Sans SC', -apple-system, 'Segoe UI', system-ui, sans-serif;
  --serif: 'Instrument Serif', 'Noto Sans SC', Georgia, 'Times New Roman', serif;
  --mono:  'JetBrains Mono', 'Noto Sans SC', ui-monospace, Consolas, monospace;

  --shell:    1700px;
  --pad:      clamp(20px, 5vw, 76px);
  --radius-l: 26px;
  --ease:     cubic-bezier(.16, 1, .3, 1);
}

/* ------------------------------------------------------------------ 基础 --- */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

body {
  margin: 0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.7;
  letter-spacing: -.005em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, p, ol, ul, figure { margin: 0; padding: 0; }
ol, ul { list-style: none; }
a { color: inherit; text-decoration: none; }
b, strong { font-weight: 400; }

::selection { background: rgba(127, 216, 238, .26); color: #fff; }
:focus-visible { outline: 1px solid var(--accent); outline-offset: 5px; border-radius: 2px; }

.mono {
  font-family: var(--mono);
  font-size: .64rem;
  font-weight: 400;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--text-3);
  line-height: 1.9;
}

.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding-inline: var(--pad);
}

.skip {
  position: fixed; top: 10px; left: 10px; z-index: 80;
  padding: 10px 16px; border-radius: 999px;
  background: var(--text); color: var(--ink);
  font-family: var(--mono); font-size: .68rem; letter-spacing: .16em;
  transform: translateY(-160%);
}
.skip:focus { transform: none; }

/* ------------------------------------------------- 背景与叠加层（画面） --- */
.bg, .bg-fallback { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; }
.bg { display: block; }
.bg-fallback { pointer-events: none; opacity: 0; transition: opacity .8s ease; }
/* WebGL 不可用时才显示静态替身：构图与着色器一致（暗核 + 亮环） */
.no-webgl .bg-fallback { opacity: 1; }

/* 遮罩：在标题处压出一片暗池，顶/底各压一道。
   可读性由「构图 + 这道柔和的暗池」保证，不是把整幅背景调暗。 */
.veil {
  position: fixed; inset: 0; z-index: 2; pointer-events: none;
  background:
    radial-gradient(ellipse 64% 42% at 50% 47%, rgba(5,7,10,.68), rgba(5,7,10,0) 78%),
    linear-gradient(to bottom,
      rgba(5,7,10,.74) 0%, rgba(5,7,10,0) 17%,
      rgba(5,7,10,0) 60%, rgba(5,7,10,.58) 87%, rgba(5,7,10,.88) 100%);
}

/* 颗粒：给数字画面一点胶片的粗糙，同时给玻璃面板一点质感 */
.grain {
  position: fixed; inset: 0; z-index: 3; pointer-events: none; opacity: .035;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
  background-repeat: repeat;
}

/* 仪表框架：内缩发丝线 + 四角刻线 */
.frame {
  position: fixed; inset: 14px; z-index: 14; pointer-events: none;
  border: 1px solid rgba(234, 238, 244, .055); border-radius: 3px;
}
.tick {
  position: absolute; width: 10px; height: 10px;
  border: 0 solid rgba(234, 238, 244, .30);
}
.tick.tl { top: -1px; left: -1px; border-top-width: 1px; border-left-width: 1px; }
.tick.tr { top: -1px; right: -1px; border-top-width: 1px; border-right-width: 1px; }
.tick.bl { bottom: -1px; left: -1px; border-bottom-width: 1px; border-left-width: 1px; }
.tick.br { bottom: -1px; right: -1px; border-bottom-width: 1px; border-right-width: 1px; }

/* 两侧竖轨 */
.rail {
  position: fixed; top: 0; height: 100vh; width: 34px; z-index: 12;
  display: flex; align-items: center; justify-content: center; pointer-events: none;
}
.rail-l { left: 16px; }
.rail-r { right: 16px; }
.rail span {
  writing-mode: vertical-rl;
  font-family: var(--mono); font-size: .56rem; letter-spacing: .34em;
  text-transform: uppercase; color: rgba(234, 238, 244, .28); white-space: nowrap;
}
.rail-l span { transform: rotate(180deg); }
.rail-r b { font-weight: 400; color: rgba(234, 238, 244, .5); }

/* 光标 */
.cursor { position: fixed; inset: 0; z-index: 60; pointer-events: none; opacity: 0; }
.has-cursor .cursor { opacity: 1; }
.cursor-dot, .cursor-ring { position: absolute; top: 0; left: 0; border-radius: 50%; }
.cursor-dot {
  width: 4px; height: 4px; background: var(--text);
  transform: translate3d(-100px, -100px, 0) translate(-50%, -50%);
}
.cursor-ring {
  width: 32px; height: 32px; border: 1px solid rgba(234, 238, 244, .30);
  transform: translate3d(-100px, -100px, 0) translate(-50%, -50%);
  transition: width .45s var(--ease), height .45s var(--ease),
              border-color .45s ease, background-color .45s ease;
}
.cursor.is-hot .cursor-ring {
  width: 56px; height: 56px;
  border-color: rgba(127, 216, 238, .55);
  background: rgba(127, 216, 238, .05);
}
@media (hover: hover) and (pointer: fine) {
  body, a, button { cursor: none; }
}
@media (hover: none) { .cursor { display: none; } }

/* ------------------------------------------------------------------ 导航 --- */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 40; }
.nav-inner {
  width: 100%; max-width: var(--shell); margin: 0 auto;
  display: flex; align-items: center; gap: clamp(16px, 3vw, 48px);
  padding: 14px clamp(18px, 1.8vw, 26px);
  margin-top: 16px;
  border: 1px solid transparent; border-radius: 999px;
  transition: background-color .7s ease, border-color .7s ease,
              backdrop-filter .7s ease, box-shadow .7s ease, margin-top .7s var(--ease);
}
/* 顶部时完全敞开，只留一条内缩的外框；滚动后收成玻璃药丸 */
.nav-inner { width: calc(100% - 2 * var(--pad)); }
.nav.is-scrolled .nav-inner {
  background: rgba(8, 11, 17, .76);
  border-color: rgba(234, 238, 244, .085);
  backdrop-filter: blur(26px) saturate(150%);
  -webkit-backdrop-filter: blur(26px) saturate(150%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .06), 0 22px 70px rgba(0, 0, 0, .55);
  margin-top: 10px;
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .nav.is-scrolled .nav-inner { background: rgba(8, 11, 17, .92); }
}

.brand { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand-mark {
  font-family: var(--mono); font-size: .82rem; font-weight: 500;
  letter-spacing: .2em; color: var(--text);
}
.brand-rule { width: 26px; height: 1px; background: var(--line-2); }
.brand-sub {
  font-family: var(--mono); font-size: .56rem; letter-spacing: .28em;
  color: var(--text-2); white-space: nowrap;
}

.nav-links { display: flex; align-items: center; gap: clamp(14px, 2.2vw, 34px); margin-left: auto; }
.nav-links a { position: relative; display: flex; align-items: baseline; gap: 7px; padding: 6px 2px; }
.nav-links i {
  font-family: var(--mono); font-size: .52rem; font-style: normal;
  letter-spacing: .12em; color: var(--accent-dim); opacity: .65;
}
.nav-links span { font-size: .84rem; color: var(--text-2); transition: color .45s ease; }
.nav-links a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform .7s var(--ease);
}
.nav-links a:hover span { color: var(--text); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav-cta {
  flex: 0 0 auto; display: inline-flex; align-items: center; gap: 9px;
  padding: 9px 18px; border-radius: 999px;
  border: 1px solid var(--line-2); color: var(--text);
  font-size: .8rem; letter-spacing: .01em;
  transition: background-color .6s var(--ease), border-color .6s ease,
              color .6s ease, transform .7s var(--ease);
}
.nav-cta svg { width: 14px; height: 14px; fill: none; stroke: currentColor;
  stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round;
  transition: transform .6s var(--ease); }
.nav-cta:hover { background: var(--text); border-color: var(--text); color: var(--ink); }
.nav-cta:hover svg { transform: translateX(3px); }

/* ------------------------------------------------------------ 01 ORIGIN --- */
.hero { position: relative; z-index: 10; min-height: 100svh; }
.hero .shell {
  min-height: 100svh;
  display: grid; grid-template-rows: auto 1fr auto;
  padding-top: clamp(104px, 15vh, 168px);
  padding-bottom: clamp(30px, 6vh, 68px);
}
.hero-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 24px;
}
.readout { display: flex; align-items: baseline; gap: 12px; text-align: right; }
.readout em { font-style: normal; letter-spacing: .26em; color: var(--text-3); }
.readout b {
  color: var(--accent); letter-spacing: .06em;
  font-variant-numeric: tabular-nums;
}

.hero-body { display: flex; flex-direction: column; justify-content: center; }

.hero-title {
  font-weight: 300;
  font-size: clamp(3rem, 12.8vw, 15rem);
  line-height: .94;
  letter-spacing: -.045em;
  margin-bottom: clamp(28px, 4vh, 52px);
}
.hline { display: block; overflow: hidden; padding-bottom: .06em; }
.hline > span, .hline > em { display: inline-block; will-change: transform; }
.hline > span { transform: translateY(108%); }
.hline > em { transform: translateY(108%); }
.hline.is-in > span, .hline.is-in > em { transform: none; }
.hline > span { transition: transform 1.45s var(--ease); }
.hline > em { transition: transform 1.45s var(--ease) .18s; }
/* 每一行错开一点点 —— 节奏感来自延迟，而不是更快的动画 */
.hline:nth-child(1) > span { transition-delay: .08s; }
.hline:nth-child(2) > span { transition-delay: .20s; }

.hline-2 { display: flex; align-items: baseline; gap: clamp(14px, 2.4vw, 40px); flex-wrap: wrap; }
/* 衬线斜体注脚：字号只有主标 .28em，所以位移要用它自己的百分比来算。
   420% × 0.28em ≈ 1.18em（主标单位），大于行高 .94em —— 才真的藏在遮罩下。 */
.serif {
  font-family: var(--serif); font-style: italic; font-weight: 400;
  font-size: .28em; letter-spacing: -.01em; line-height: 1;
  color: var(--text-2);
  transform: translateY(420%);
}
.hline-2.is-in .serif { transform: none; }

.hero-sub {
  max-width: 48ch;
  font-size: clamp(.92rem, 1.05vw, 1.04rem);
  line-height: 2.05;
  color: var(--text-2);
  font-weight: 400;
}

.hero-foot {
  display: flex; justify-content: space-between; align-items: flex-end; gap: 24px;
}
.scroll-cue { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; }
.scroll-cue i {
  display: block; width: 1px; height: 52px; overflow: hidden; position: relative;
  background: linear-gradient(to bottom, rgba(234,238,244,.18), rgba(234,238,244,0));
}
.scroll-cue i::after {
  content: ''; position: absolute; left: 0; top: -60%; width: 1px; height: 60%;
  background: var(--accent);
  animation: fall 3.2s cubic-bezier(.5, 0, .5, 1) infinite;
}
@keyframes fall { 0% { top: -60%; } 60%, 100% { top: 100%; } }
.hero-foot-r { text-align: right; }

/* ------------------------------------------------------- 02 PROPOSITION --- */
.section { position: relative; z-index: 10; }
.prop { padding: clamp(120px, 20vh, 260px) 0; }
.prop-grid {
  display: grid; grid-template-columns: minmax(140px, 20%) 1fr;
  gap: clamp(28px, 5vw, 90px); align-items: start;
}
.side { position: sticky; top: clamp(120px, 20vh, 190px); }
.label { display: block; margin-bottom: 14px; }
.side-title {
  font-size: clamp(1.1rem, 1.5vw, 1.5rem); font-weight: 300;
  letter-spacing: .02em; color: var(--text);
}
.side-title::before {
  content: ''; display: block; width: 34px; height: 1px;
  background: var(--line-2); margin-bottom: 18px;
}

.lit {
  font-size: clamp(1.35rem, 2.6vw, 2.65rem);
  line-height: 1.62; font-weight: 300; letter-spacing: -.02em;
  max-width: 30em;
}
.lit span { display: inline; color: var(--text-3); }
.note { display: block; margin-top: clamp(36px, 6vh, 72px); max-width: 30ch; }

.sec-head { display: flex; flex-direction: column; gap: 14px; margin-bottom: clamp(44px, 7vh, 92px); }
.sec-head .side-title::before { display: none; }

/* ------------------------------------------------------------ 03 METHOD --- */
.method { padding: clamp(80px, 12vh, 150px) 0; }
.rows { border-top: 1px solid var(--line); }
.row {
  position: relative;
  display: grid;
  grid-template-columns: clamp(48px, 5vw, 84px) minmax(140px, 17%) 1fr minmax(130px, 15%);
  gap: clamp(16px, 3vw, 48px); align-items: baseline;
  padding: clamp(26px, 3.6vw, 50px) 0;
  border-bottom: 1px solid var(--line);
}
.row h3 {
  font-size: clamp(1.4rem, 2.3vw, 2.25rem); font-weight: 300;
  letter-spacing: -.025em; line-height: 1.2;
  transition: transform .9s var(--ease), color .9s ease;
}
.row p { color: var(--text-2); font-size: clamp(.86rem, .95vw, .97rem);
  line-height: 1.95; max-width: 52ch; font-weight: 400; }
.row .idx { color: var(--accent-dim); letter-spacing: .2em; opacity: .7; }
.row-meta {
  text-align: right; font-size: .56rem; letter-spacing: .2em;
  color: var(--text-3); white-space: nowrap;
  transition: color .9s ease;
}
.row:hover .row-meta { color: var(--text-2); }
.row-rule {
  position: absolute; left: 0; bottom: -1px; height: 1px; width: 0;
  background: linear-gradient(90deg, var(--accent), rgba(127, 216, 238, 0));
  transition: width 1.1s var(--ease);
}
.row:hover .row-rule { width: 100%; }
.row:hover h3 { transform: translateX(clamp(4px, .6vw, 12px)); }

/* -------------------------------------------------------- 04 PRINCIPLES --- */
.princ { padding: clamp(80px, 12vh, 150px) 0; }
.creed {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: clamp(24px, 3.4vw, 56px);
}
.creed li { position: relative; padding-top: clamp(22px, 3vw, 38px); }
.creed li::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: var(--line);
}
.creed .n { display: block; margin-bottom: clamp(34px, 6vw, 84px); color: var(--accent-dim); }
.creed p {
  font-size: clamp(1.25rem, 2.2vw, 2.25rem); font-weight: 300;
  line-height: 1.42; letter-spacing: -.025em;
}

/* ------------------------------------------------------------- 05 ACCESS --- */
.access { padding: clamp(60px, 9vh, 120px) 0 clamp(120px, 18vh, 220px); }
.glass-panel {
  position: relative; overflow: hidden;
  border: 1px solid var(--line-2); border-radius: var(--radius-l);
  padding: clamp(34px, 5.4vw, 96px);
  background: linear-gradient(158deg,
    rgba(255, 255, 255, .058) 0%, rgba(255, 255, 255, .014) 44%, rgba(255, 255, 255, .034) 100%);
  backdrop-filter: blur(30px) saturate(155%);
  -webkit-backdrop-filter: blur(30px) saturate(155%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .10), 0 46px 130px rgba(0, 0, 0, .6);
}
/* 面板左上角的一片光晕，暗示身后有个光源 */
.glass-panel::before {
  content: ''; position: absolute; top: -46%; left: -14%; width: 62%; height: 150%;
  background: radial-gradient(circle at 32% 32%, rgba(127, 216, 238, .16), rgba(127, 216, 238, 0) 62%);
  pointer-events: none;
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass-panel { background: rgba(11, 15, 21, .94); }
}

.panel-grid {
  display: grid; grid-template-columns: 1fr minmax(200px, 25%);
  gap: clamp(32px, 5vw, 96px); align-items: start;
}
.panel-aside dl { display: flex; flex-direction: column; gap: 24px; }
.panel-aside dl > div { border-top: 1px solid var(--line); padding-top: 17px; }
.panel-aside dt {
  font-family: var(--mono); font-size: .56rem; letter-spacing: .14em;
  color: var(--text-3); margin-bottom: 8px;
}
.panel-aside dd { margin: 0; font-size: .84rem; color: var(--text-2); line-height: 1.7; }

.panel-head {
  display: flex; justify-content: space-between; align-items: baseline; gap: 20px;
  margin-bottom: clamp(38px, 6vw, 78px);
}
.panel-head .label { margin-bottom: 0; }
/* 面板是半透的，底下直接是发光的光环 —— 这里的等宽小字必须比页面同级更亮 */
.panel-head .mono { color: var(--text-2); }
.panel-title {
  font-size: clamp(2.6rem, 6.8vw, 6.4rem); font-weight: 300;
  line-height: .98; letter-spacing: -.045em;
  margin-bottom: clamp(26px, 4vw, 44px);
}
.panel-body {
  max-width: 58ch; color: var(--text-2);
  font-size: clamp(.9rem, 1vw, 1rem); line-height: 2.05;
}
.panel-actions {
  display: flex; flex-wrap: wrap; gap: 14px; margin-top: clamp(36px, 5vw, 62px);
}
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 15px 28px; border-radius: 999px;
  background: var(--text); color: var(--ink);
  font-size: .86rem; font-weight: 500; letter-spacing: .005em;
  border: 1px solid var(--text);
  transition: transform .7s var(--ease), box-shadow .7s ease, background-color .7s ease;
}
.btn svg { width: 15px; height: 15px; fill: none; stroke: currentColor;
  stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round;
  transition: transform .7s var(--ease); }
.btn:hover { box-shadow: 0 18px 46px rgba(127, 216, 238, .16); }
.btn:hover svg { transform: translateX(4px); }
.btn-ghost {
  background: transparent; color: var(--text-2); border-color: var(--line-2);
}
.btn-ghost:hover { color: var(--text); border-color: rgba(234, 238, 244, .34); box-shadow: none; }

/* ------------------------------------------------------------ 页脚 --------- */
.foot { position: relative; z-index: 10; padding-top: clamp(60px, 9vh, 110px); }
.foot .shell { border-top: 1px solid var(--line); padding-top: clamp(44px, 6vh, 76px); }
.foot-grid {
  display: grid; grid-template-columns: 1.7fr repeat(3, 1fr);
  gap: clamp(26px, 3.4vw, 56px);
}
.foot-brand .brand-mark { font-size: 1rem; display: block; margin-bottom: 16px; }
.foot-brand p { font-size: .62rem; line-height: 2; letter-spacing: .18em; }
.foot-col h4 {
  font-size: .58rem; font-weight: 400; letter-spacing: .28em;
  color: var(--text-3); margin-bottom: 18px;
}
.foot-col a {
  display: block; font-size: .85rem; color: var(--text-2);
  padding: 6px 0; max-width: fit-content;
  transition: color .5s ease, transform .6s var(--ease);
}
.foot-col a:hover { color: var(--text); transform: translateX(4px); }

.foot-meta {
  display: flex; flex-wrap: wrap; gap: 12px 28px;
  justify-content: space-between; align-items: baseline;
  margin-top: clamp(56px, 8vh, 104px); padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: .58rem; letter-spacing: .18em;
}
.foot-meta-r { color: var(--text-2); letter-spacing: .22em; }

/* 巨幅字标：刻意被下边缘裁掉一截，并用渐变把裁口化开 */
.wordmark {
  overflow: hidden;
  height: clamp(64px, 11.6vw, 178px);
  margin-top: clamp(30px, 5vh, 68px);
  -webkit-mask-image: linear-gradient(to bottom, #000 34%, rgba(0, 0, 0, .18) 82%, transparent 100%);
  mask-image: linear-gradient(to bottom, #000 34%, rgba(0, 0, 0, .18) 82%, transparent 100%);
}
.wordmark span {
  display: block; text-align: center; white-space: nowrap;
  font-family: var(--sans);
  font-size: clamp(3.4rem, 16.4vw, 17.6rem);
  font-weight: 300; line-height: .84; letter-spacing: -.06em;
  transform: translateY(-.02em);
  background: linear-gradient(178deg, rgba(234, 238, 244, .20), rgba(234, 238, 244, .035));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* -------------------------------------------------------------- 揭示动效 --- */
[data-reveal] {
  opacity: 0; transform: translateY(22px);
  transition: opacity 1.25s var(--ease), transform 1.25s var(--ease);
  transition-delay: calc(var(--i, 0) * .11s);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* -------------------------------------------------------------- 响应式 --- */
@media (max-width: 1240px) {
  .creed { grid-template-columns: repeat(2, 1fr); row-gap: clamp(34px, 5vw, 56px); }
  .foot-grid { grid-template-columns: 1fr 1fr 1fr; row-gap: 40px; }
  .foot-brand { grid-column: 1 / -1; }
}
@media (max-width: 1080px) {
  .rail, .frame { display: none; }
  .nav-links i { display: none; }
}
@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-inner { justify-content: space-between; }
  .prop-grid { grid-template-columns: 1fr; gap: 30px; }
  .side { position: static; }
  .row { grid-template-columns: 40px 1fr; gap: 10px 18px; }
  .row p { grid-column: 2; }
  .row-meta { grid-column: 2; text-align: left; }
  .panel-grid { grid-template-columns: 1fr; gap: 34px; }
  .serif { display: block; font-size: .30em; margin-top: .1em; }
  .hline-2 { display: block; }
}
@media (max-width: 620px) {
  .hero-title { font-size: clamp(2.9rem, 17vw, 5.4rem); letter-spacing: -.04em; }
  .creed { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .brand-sub, .rail, .hero-foot-r { display: none; }
  .panel-head { flex-direction: column; gap: 6px; }
}

/* -------------------------------------------------------- 减少动效偏好 --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    transition-delay: 0s !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .hline { overflow: visible; }
  .hline > span, .hline > em, .serif { transform: none !important; }
  .lit span { color: var(--text) !important; }
}