/* =========================================================
   银龄医问 SILVERMEDCARE · 视觉样式
   参考 Endfield 官网的工业界面语言：深海蓝 + 医疗青、窄侧导航、
   宽体英文标签、编号分区、HUD 标记、等高线纹理与巨型字标。
   ========================================================= */


:root {
  /* 主题：深海蓝 + 医疗青。改色只需调整这里 */
  --ink: #0c1d2b;          /* 深海蓝：主深色、深色区块 */
  --ink-rgb: 12, 29, 43;
  --ink-0: #07131d;
  --ink-2: #102536;
  --ink-3: #1b3346;
  --ink-4: #3b5466;
  --paper: #eef2f3;
  --white: #f8fafa;
  --white-rgb: 248, 250, 250;
  --gray: #e1e7e9;
  --gray-2: #cdd7db;
  --mute: #4e5d66;
  --mute-2: #83939b;
  --muted-display: #74858e;
  --on-dark: #e8eef1;
  --on-dark-2: #a9b8c0;
  --on-dark-3: #7f909a;
  --line: rgba(var(--ink-rgb), .14);
  --line-2: rgba(var(--ink-rgb), .32);
  --line-dark: rgba(255, 255, 255, .16);
  --accent: #2ed3c6;       /* 医疗青：品牌强调色，只作底色或深底上的文字 */
  --accent-2: #7ce6dd;
  --accent-rgb: 46, 211, 198;
  --warn: #ffb020;         /* 琥珀：专用于用药风险等提醒，勿作装饰 */
  --rec: #e5484d;
  --rail: 96px;
  --pad: clamp(28px, 6vw, 112px);
  --f-latin: "Archivo SMC", "Arial Narrow", Arial, sans-serif;
  --f-display: "SMC Display", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --f-body: "Archivo SMC", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Source Han Sans SC", sans-serif;
  --ease: cubic-bezier(.2, .7, .1, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.8 var(--f-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; box-shadow: 0 0 0 7px var(--ink); }
::selection { background: var(--accent); color: var(--ink); }
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
svg { fill: currentColor; }

/* ---------- 共用元件 ---------- */
.wide { font-family: var(--f-latin); font-stretch: 125%; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; }
.display { font-family: var(--f-display); font-weight: 900; letter-spacing: -.02em; }
.muted { color: var(--muted-display); }
.dot { width: 8px; height: 8px; background: var(--accent); display: inline-block; flex-shrink: 0; }

.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: space-between; gap: 32px;
  min-height: 62px; padding: 0 22px 0 26px; border: 0; cursor: pointer;
  font-size: 17px; font-weight: 700; letter-spacing: .04em; white-space: nowrap;
  transition: background .25s var(--ease), color .25s var(--ease), transform .25s var(--ease), border-color .25s;
}
.btn svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.8; }
.btn svg use { fill: none; }
.btn-accent { background: var(--accent); color: var(--ink); clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%); }
.btn-accent:hover { background: #fff; transform: translateY(-2px); }
.btn-accent:focus-visible { outline: 3px solid var(--ink); outline-offset: -7px; box-shadow: none; }
.btn-ghost { color: #fff; border: 1px solid rgba(255, 255, 255, .55); background: rgba(var(--ink-rgb), .2); backdrop-filter: blur(6px); }
.btn-ghost:hover { background: #fff; color: var(--ink); border-color: #fff; }
.btn-dark { background: var(--ink); color: #fff; padding-left: 30px; }
.btn-dark::before { content: ""; position: absolute; left: 12px; top: 18px; bottom: 18px; width: 3px; background: var(--accent); }
.btn-dark:hover { background: var(--ink-3); }
.btn-block { width: 100%; }
.btn-disabled { width: 100%; background: var(--ink-3); color: var(--on-dark-2); cursor: not-allowed; padding-left: 30px; font-size: 16px; }
.btn-disabled::before { content: ""; position: absolute; left: 12px; top: 20px; bottom: 20px; width: 3px; background: var(--ink-4); }

.chip-dark { display: inline-flex; align-items: center; min-height: 28px; padding: 3px 10px; background: var(--ink); color: #fff; font: 700 12px/1 var(--f-latin); font-stretch: 125%; letter-spacing: .1em; text-transform: uppercase; }
.round-btn { width: 46px; height: 46px; border-radius: 50%; display: grid; place-items: center; border: 1px solid var(--line-2); background: var(--white); cursor: pointer; transition: background .2s, color .2s, border-color .2s; }
.round-btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; }
.round-btn svg use { fill: none; }
.round-btn:hover { background: var(--ink); color: var(--accent); border-color: var(--ink); }

.barcode {
  display: block; height: 30px; width: 96px;
  background: linear-gradient(90deg, currentColor 0 2px, transparent 2px 4px, currentColor 4px 5px, transparent 5px 8px, currentColor 8px 11px, transparent 11px 12px, currentColor 12px 13px, transparent 13px 16px, currentColor 16px 17px, transparent 17px 19px, currentColor 19px 23px, transparent 23px 25px, currentColor 25px 26px, transparent 26px 29px, currentColor 29px 31px, transparent 31px 32px) 0 0 / 32px 100% repeat-x;
}
.cmy { display: flex; width: 34px; height: 5px; }
.cmy i { flex: 1; }
.cmy i:nth-child(1) { background: var(--accent); }
.cmy i:nth-child(2) { background: var(--accent-2); }
.cmy i:nth-child(3) { background: #fff; }
.chevrons {
  display: block; height: 14px; width: 120px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='20' height='14'%3E%3Cpath d='M2 0h7l7 7-7 7H2l7-7z' fill='%230c1d2b'/%3E%3C/svg%3E") 0 0 / 20px 14px repeat-x;
  opacity: .85;
}
.chevrons.light { filter: invert(1); }

/* 细胞组织纹理（无缝平铺，assets/pattern-cells.svg） */
.tissue { position: relative; isolation: isolate; }
.tissue::before {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: url("assets/pattern-cells.svg") 0 0 / 1200px auto repeat; opacity: .06;
}
.tissue.dark::before { filter: invert(1); opacity: .08; }

/* ---------- 开场加载 ---------- */
.loader { display: none; }
.is-loading .loader {
  position: fixed; inset: 0; z-index: 200; display: flex; flex-direction: column; justify-content: space-between;
  padding: 48px; background: var(--ink) url("assets/pattern-cells.svg") 0 0 / 1200px auto repeat; color: #fff;
  animation: loader-out .55s var(--ease) forwards paused;
}
.is-loading .loader::before { content: ""; position: absolute; inset: 0; background: rgba(var(--ink-rgb), .93); z-index: -1; }
.is-loading .loader { isolation: isolate; }
.loader-mark { align-self: center; margin-top: 22vh; display: flex; align-items: center; gap: 18px; font: 900 34px/1.05 var(--f-display); }
.loader-mark svg { width: 64px; height: 66px; fill: var(--accent); }
.loader-meter { display: grid; gap: 10px; width: min(560px, 80vw); }
.loader-tick { width: 4px; height: 18px; background: var(--accent); }
.loader-num { font: 600 52px/1 var(--f-latin); font-stretch: 100%; color: var(--accent); font-variant-numeric: tabular-nums; }
.loader-bar { display: block; height: 16px; background: rgba(255, 255, 255, .08); margin-left: -48px; }
.loader-bar i { display: block; height: 100%; width: 0; background: var(--accent); transition: width .2s linear; }
.loader-meter small { font: 600 11px var(--f-latin); letter-spacing: .14em; color: var(--on-dark-3); }
.loader-motto { margin: 0; padding-top: 18px; border-top: 1px solid var(--line-dark); font: 700 14px var(--f-latin); font-stretch: 125%; letter-spacing: .06em; }
.loader-motto i { font-style: normal; color: var(--accent); padding: 0 8px; }
.loader.is-done { animation-play-state: running; }
@keyframes loader-out { to { opacity: 0; transform: translateY(-3%); visibility: hidden; } }

.skip-link { position: fixed; left: 112px; top: -90px; z-index: 300; padding: 14px 18px; background: var(--accent); color: var(--ink); font-weight: 700; }
.skip-link:focus { top: 12px; }

/* ---------- 侧边导航 ---------- */
.rail {
  position: fixed; inset: 0 auto 0 0; z-index: 60; width: var(--rail);
  display: flex; flex-direction: column; align-items: stretch;
  background: var(--white); border-right: 1px solid var(--line);
}
.rail-logo { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 22px 0 20px; border-bottom: 1px solid var(--line); }
.logo-mark { width: 34px; height: 35px; fill: var(--ink); }
.logo-text { font: 900 21px/1.04 var(--f-display); letter-spacing: -.02em; text-align: center; }
.menu-toggle { display: none; }
.primary-nav { display: flex; flex-direction: column; margin-top: 18px; }
.nav-link {
  position: relative; display: grid; justify-items: center; gap: 3px; padding: 14px 4px 13px;
  color: var(--mute); transition: background .2s, color .2s;
}
.nav-num { font: 600 12px/1 var(--f-latin); letter-spacing: .08em; padding: 3px 6px; }
.nav-cn { font-size: 15px; font-weight: 700; line-height: 1.3; letter-spacing: .08em; }
.nav-en { font: 600 8px/1 var(--f-latin); font-stretch: 125%; letter-spacing: .1em; color: var(--mute-2); }
.nav-link:hover { background: var(--gray); color: var(--ink); }
.nav-link.active { background: var(--ink); color: #fff; }
.nav-link.active .nav-num { background: var(--accent); color: var(--ink); }
.nav-link.active .nav-en { color: var(--on-dark-3); }
.nav-link.active::after { content: ""; position: absolute; right: -1px; top: 50%; width: 0; height: 0; border: 7px solid transparent; border-right-color: var(--paper); transform: translateY(-50%); }
.nav-cta { display: none; }
.rail-foot { margin-top: auto; display: flex; flex-direction: column; align-items: center; gap: 16px; padding: 0 0 16px; }
.rail-progress { position: relative; width: 3px; height: 72px; background: var(--gray); overflow: hidden; }
.rail-progress i { position: absolute; inset: 0; background: var(--ink); transform-origin: top; transform: scaleY(var(--progress, 0)); }
.rail-dl { display: grid; justify-items: center; gap: 6px; width: 70px; padding: 12px 0 10px; background: var(--ink); color: #fff; font-size: 12px; line-height: 1.35; text-align: center; font-weight: 700; transition: background .2s; }
.rail-dl svg { width: 26px; height: 26px; fill: none; stroke: var(--accent); stroke-width: 2; }
.rail-dl svg use { fill: none; }
.rail-dl:hover { background: var(--ink-3); }

main { margin-left: var(--rail); }
.section { position: relative; padding: 64px var(--pad) 88px; }
.paper { background-color: var(--paper); }

/* ---------- 区块标题 ---------- */
.sec-head { display: grid; grid-template-columns: auto 1fr auto; align-items: end; column-gap: 22px; row-gap: 8px; padding-bottom: 20px; margin-bottom: 56px; border-bottom: 1px solid var(--line); }
.sec-tag { grid-column: 1 / -1; display: flex; align-items: center; gap: 10px; }
.sec-num { display: inline-grid; place-items: center; min-width: 40px; height: 24px; padding: 0 6px; background: var(--gray-2); color: var(--ink); font: 700 12px/1 var(--f-latin); letter-spacing: .06em; }
.sec-tag svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2.2; }
.sec-tag svg use { fill: none; }
.sec-en { font: 700 14px/1 var(--f-latin); font-stretch: 125%; letter-spacing: .06em; text-transform: uppercase; }
.sec-cn { grid-column: 1; margin: 0; font: 900 30px/1.2 var(--f-display); letter-spacing: .02em; }
.sec-index { grid-column: 3; font: 600 11px/1.6 var(--f-latin); letter-spacing: .12em; color: var(--mute-2); }
.sec-head.light { border-color: var(--line-dark); }
.sec-head.light .sec-num { background: var(--accent); }
.sec-head.light .sec-cn { color: #fff; }

/* ---------- 首屏 ---------- */
.hero { position: relative; height: 100svh; min-height: 720px; max-height: 1180px; overflow: hidden; color: #fff; background: var(--ink); }
.hero-art, .hero-art img { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-art img { object-fit: cover; object-position: 62% center; animation: hero-in 1.8s var(--ease) both; }
.hero-shade { position: absolute; inset: 0; background:
  linear-gradient(90deg, rgba(var(--ink-rgb), .84) 0%, rgba(var(--ink-rgb), .5) 38%, rgba(var(--ink-rgb), 0) 70%),
  linear-gradient(0deg, rgba(var(--ink-rgb), .8) 0%, rgba(var(--ink-rgb), 0) 38%),
  linear-gradient(180deg, rgba(var(--ink-rgb), .55) 0%, rgba(var(--ink-rgb), 0) 22%); }

.hero-hud { position: absolute; inset: 0; pointer-events: none; }
.hud-corner { position: absolute; width: 22px; height: 22px; border-color: rgba(255, 255, 255, .7); border-style: solid; border-width: 0; }
.hud-corner.tl { left: 28px; top: 96px; border-left-width: 1px; border-top-width: 1px; }
.hud-corner.tr { right: 28px; top: 96px; border-right-width: 1px; border-top-width: 1px; }
.hud-corner.bl { left: 28px; bottom: 28px; border-left-width: 1px; border-bottom-width: 1px; }
.hud-corner.br { right: 28px; bottom: 28px; border-right-width: 1px; border-bottom-width: 1px; }
.hud-column { position: absolute; left: 36px; top: 50%; transform: translateY(-50%); display: grid; gap: 14px; color: rgba(255, 255, 255, .7); }
.hud-column p { margin: 0; font: 600 9px/1.7 var(--f-latin); letter-spacing: .12em; writing-mode: vertical-rl; transform: rotate(180deg); }
.hud-column .barcode { width: 18px; height: 70px; color: rgba(255, 255, 255, .6); background-size: 100% 32px; background-repeat: repeat-y; background-image: linear-gradient(0deg, currentColor 0 2px, transparent 2px 4px, currentColor 4px 5px, transparent 5px 8px, currentColor 8px 11px, transparent 11px 12px, currentColor 12px 13px, transparent 13px 16px, currentColor 16px 17px, transparent 17px 19px, currentColor 19px 23px, transparent 23px 25px, currentColor 25px 26px, transparent 26px 29px, currentColor 29px 31px, transparent 31px 32px); }
.hud-column .cmy { width: 5px; height: 34px; flex-direction: column; }
.hud-marker { position: absolute; right: 52px; top: 128px; display: grid; justify-items: end; gap: 4px; text-align: right; font: 600 10px/1.6 var(--f-latin); letter-spacing: .16em; }
.hud-marker b { font: 200 34px/1 var(--f-latin); }
.hud-marker small { font-size: 9px; opacity: .65; }

.hero-top { position: absolute; z-index: 3; left: 0; right: 0; top: 0; display: flex; justify-content: space-between; align-items: center; height: 72px; padding: 0 48px; border-bottom: 1px solid rgba(255, 255, 255, .18); background: linear-gradient(180deg, rgba(10, 12, 11, .35), transparent); }
.hero-path { font: 700 13px var(--f-latin); font-stretch: 125%; letter-spacing: .08em; }
.hero-path i { font-style: normal; color: var(--accent); padding: 0 10px; }
.hero-tag { display: inline-flex; align-items: center; gap: 10px; padding: 6px 12px; border: 1px solid rgba(255, 255, 255, .35); font-size: 14px; letter-spacing: .06em; }

.hero-content { position: relative; z-index: 2; padding: clamp(150px, 22vh, 250px) 0 0 clamp(64px, 8vw, 132px); max-width: 980px; }
.kicker { margin: 0; display: flex; align-items: center; gap: 10px; font: 700 13px var(--f-latin); font-stretch: 125%; letter-spacing: .1em; color: var(--on-dark); }
.kicker-bracket { color: var(--accent); font-weight: 400; }
.hero-title { margin: 26px 0 24px; font: 900 clamp(60px, 7.2vw, 118px)/1.16 var(--f-display); letter-spacing: -.03em; }
.hero-title .line { display: block; }
.hero-title mark { display: inline-block; line-height: 1.02; padding: .03em .08em .05em; margin: 0 .04em; background: var(--accent); color: var(--ink); }
.hero-sub { margin: 0; font-size: clamp(17px, 1.35vw, 20px); line-height: 1.9; letter-spacing: .06em; color: var(--on-dark); }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px; margin-top: 40px; }
.hero-actions .btn { min-width: 210px; }

.hero-dock { position: absolute; z-index: 3; right: 48px; bottom: 96px; display: flex; gap: 6px; padding: 6px; background: rgba(var(--ink-rgb), .82); backdrop-filter: blur(10px); }
.dock-app { display: grid; align-content: space-between; width: 112px; padding: 12px; background: var(--ink-0); transition: background .2s; }
.dock-app:hover { background: #030a10; }
.dock-icon { display: grid; place-items: center; width: 42px; height: 42px; background: var(--accent); }
.dock-icon svg { width: 24px; height: 25px; fill: var(--ink); }
.dock-name { margin-top: 14px; font: 900 17px/1.2 var(--f-display); }
.dock-sub { font: 700 9px var(--f-latin); font-stretch: 125%; letter-spacing: .12em; color: var(--on-dark-3); }
.dock-main { display: grid; gap: 6px; min-width: 220px; padding: 12px 16px 12px 14px; background: var(--ink-3); }
.dock-head { display: flex; align-items: center; gap: 8px; margin: 0; font-size: 14px; font-weight: 700; }
.dock-badge { display: grid; place-items: center; width: 20px; height: 20px; background: var(--accent); }
.dock-badge svg { width: 14px; height: 14px; fill: none; stroke: var(--ink); stroke-width: 2.6; }
.dock-badge svg use, .dock-link svg use { fill: none; }
.dock-status { margin: 0; font-size: 17px; font-weight: 700; color: #fff; }
.dock-link { display: inline-flex; align-items: center; justify-content: space-between; gap: 12px; padding: 8px 10px; background: var(--ink); font-size: 14px; color: var(--on-dark); transition: background .2s, color .2s; }
.dock-link svg { width: 18px; height: 18px; fill: none; stroke: var(--accent); stroke-width: 2; }
.dock-link:hover { background: var(--accent); color: var(--ink); }
.dock-link:hover svg { stroke: var(--ink); }

.hero-foot { position: absolute; z-index: 3; left: 48px; right: 48px; bottom: 30px; display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.scroll-cue { display: inline-flex; align-items: center; gap: 14px; font-size: 15px; letter-spacing: .08em; }
.scroll-cue small { font: 600 10px var(--f-latin); letter-spacing: .16em; opacity: .65; }
.scroll-line { position: relative; width: 1px; height: 38px; background: rgba(255, 255, 255, .3); overflow: hidden; }
.scroll-line i { position: absolute; left: 0; width: 1px; height: 14px; background: var(--accent); animation: scroll-drop 1.8s var(--ease) infinite; }
.concept-label { font-size: 12px; color: rgba(255, 255, 255, .72); letter-spacing: .04em; }

/* ---------- 巨型字标走马灯 ---------- */
.marquee { overflow: hidden; background: var(--white); border-bottom: 1px solid var(--line); }
.marquee-track { display: flex; width: max-content; align-items: center; gap: .45em; padding: 18px 0 6px; font: 900 clamp(64px, 9.4vw, 156px)/1 var(--f-latin); font-stretch: 125%; letter-spacing: -.01em; white-space: nowrap; animation: marquee 38s linear infinite; }
.marquee-track .cn { font-family: var(--f-display); font-stretch: normal; font-size: .82em; letter-spacing: .02em; color: transparent; -webkit-text-stroke: 1.5px var(--ink); }
.marquee-meta { display: flex; justify-content: space-between; gap: 24px; padding: 12px var(--pad) 14px; border-top: 1px solid var(--line); font: 700 12px var(--f-latin); font-stretch: 125%; letter-spacing: .12em; color: var(--mute); }
.marquee-meta .cn { font-family: var(--f-body); font-stretch: normal; font-size: 15px; letter-spacing: .14em; color: var(--ink); background: var(--accent); padding: 0 10px; }

/* ---------- 产品功能 ---------- */
.features-layout { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(36px, 5vw, 88px); align-items: start; }
.features-copy { position: sticky; top: 40px; }
.features h2, .about h2, .download h2, .team h2, .journey h2 { margin: 0; font-size: clamp(40px, 4.4vw, 68px); line-height: 1.22; }
.lede { margin: 26px 0 36px; max-width: 30em; font-size: 18px; line-height: 1.9; color: var(--mute); }
.feature-tabs { border-top: 1px solid var(--ink); }
.feature-tab {
  position: relative; display: grid; grid-template-columns: 52px 1fr 24px; align-items: center; gap: 14px;
  width: 100%; min-height: 76px; padding: 12px 18px 12px 0; text-align: left; cursor: pointer;
  border: 0; border-bottom: 1px solid var(--line); background: transparent; transition: background .2s, color .2s, padding .25s var(--ease);
}
.ft-num { display: grid; place-items: center; height: 26px; font: 700 13px/1 var(--f-latin); letter-spacing: .06em; color: var(--mute); }
.ft-name { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; }
.ft-name strong { font-size: 20px; font-weight: 700; letter-spacing: .04em; }
.ft-name small { font-size: 14px; color: var(--mute); }
.feature-tab svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.8; transition: transform .25s var(--ease); }
.feature-tab svg use { fill: none; }
.feature-tab:hover:not(.selected) { background: var(--gray); }
.feature-tab:hover svg { transform: translate(2px, -2px); }
.feature-tab.selected { background: var(--ink); color: #fff; padding-left: 10px; }
.feature-tab.selected .ft-num { background: var(--accent); color: var(--ink); margin-left: 4px; }
.feature-tab.selected small { color: var(--on-dark-2); }
.feature-tab.selected svg { color: var(--accent); }
.feature-tab.selected::before { content: ""; position: absolute; right: -10px; top: 50%; border: 10px solid transparent; border-left-color: var(--ink); border-right: 0; transform: translateY(-50%); }
.footnote { margin: 18px 0 0; font-size: 13px; line-height: 1.8; color: var(--mute); }

.stage-wrap { min-width: 0; }
.product-stage {
  position: relative; isolation: isolate; display: grid; place-items: center; min-height: 660px; padding: 64px 90px 56px 32px; overflow: hidden;
  background: var(--white); border: 1px solid var(--line);
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 48px 48px; background-position: -1px -1px;
}
.product-stage::after { content: ""; position: absolute; inset: 0; z-index: 0; background: radial-gradient(ellipse at 45% 50%, rgba(var(--white-rgb), 0) 0, rgba(var(--white-rgb), .85) 72%); pointer-events: none; }
.stage-hatch {
  position: absolute; left: 0; right: 64px; top: 50%; transform: translateY(-58%); text-align: center; z-index: 1;
  font: 900 clamp(120px, 15vw, 250px)/1 var(--f-latin); font-stretch: 125%; letter-spacing: -.02em;
  color: transparent; -webkit-text-stroke: 1px var(--gray-2);
  background: repeating-linear-gradient(135deg, var(--gray-2) 0 1.4px, transparent 1.4px 7px);
  -webkit-background-clip: text; background-clip: text;
}
.stage-hud { position: absolute; z-index: 2; left: 20px; top: 18px; right: 84px; display: flex; align-items: center; gap: 18px; font: 600 11px var(--f-latin); letter-spacing: .12em; color: var(--mute); }
.stage-hud .rec b { color: var(--rec); font-weight: 700; padding: 0 6px; }
.stage-hud .rec b::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--rec); margin-right: 6px; vertical-align: 1px; animation: blink 1.4s steps(2) infinite; }
.stage-hud .chevrons { width: 100px; }
.stage-label { margin-left: auto; }
.stage-cross { position: absolute; z-index: 2; font: 300 28px/1 var(--f-latin); color: var(--mute-2); }
.stage-cross.c1 { right: 88px; top: 70px; }
.stage-cross.c2 { left: 22px; bottom: 26px; }
.stage-strip { position: absolute; z-index: 3; top: 0; right: 0; bottom: 0; width: 64px; display: flex; flex-direction: column; justify-content: space-between; align-items: center; padding: 22px 0 18px; background: var(--accent); }
.stage-strip span { writing-mode: vertical-rl; font: 900 30px/1 var(--f-latin); font-stretch: 125%; letter-spacing: .02em; }
.stage-strip .barcode { width: 34px; height: 64px; color: var(--ink); background-size: 100% 32px; background-repeat: repeat-y; background-image: linear-gradient(0deg, currentColor 0 2px, transparent 2px 4px, currentColor 4px 5px, transparent 5px 8px, currentColor 8px 11px, transparent 11px 12px, currentColor 12px 13px, transparent 13px 16px, currentColor 16px 17px, transparent 17px 19px, currentColor 19px 23px, transparent 23px 25px, currentColor 25px 26px, transparent 26px 29px, currentColor 29px 31px, transparent 31px 32px); }

.phone {
  position: relative; z-index: 2; width: 312px; min-height: 576px; overflow: hidden;
  background: var(--white); border: 8px solid var(--ink); border-radius: 42px;
  box-shadow: 0 30px 60px rgba(var(--ink-rgb), .2), 0 0 0 1px var(--ink-4);
}
.phone-top { height: 38px; padding: 10px 22px 0; display: flex; align-items: center; justify-content: space-between; font: 700 12px var(--f-latin); }
.phone-camera { width: 76px; height: 20px; background: var(--ink); border-radius: 14px; }
.phone-batt { width: 22px; height: 11px; border: 1.5px solid var(--ink); border-radius: 3px; position: relative; }
.phone-batt::after { content: ""; position: absolute; inset: 1.5px 5px 1.5px 1.5px; background: var(--ink); }
.phone-content { padding: 20px 20px 34px; transition: opacity .3s, transform .3s var(--ease); }
.phone-brand { display: flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 800; }
.phone-brand svg { width: 22px; height: 23px; fill: var(--ink); }
.phone-brand small { margin-left: auto; padding: 2px 6px; font-size: 11px; font-weight: 500; color: var(--mute); border: 1px solid var(--line-2); }
.phone-greeting { margin: 22px 0 4px; font-size: 14px; color: var(--mute); }
.phone h3 { margin: 0 0 18px; font: 900 28px/1.35 var(--f-display); letter-spacing: -.01em; }
.phone-demo { min-height: 290px; }
.phone.is-switching .phone-content { opacity: 0; transform: translateY(8px); }
.phone-scan { position: absolute; left: 0; right: 0; top: -10%; height: 3px; background: var(--accent); box-shadow: 0 0 18px 4px rgba(var(--accent-rgb), .55); opacity: 0; pointer-events: none; }
.phone.is-switching .phone-scan { animation: scan .55s var(--ease); }
.phone-bottom { position: absolute; left: 0; right: 0; bottom: 8px; }
.phone-home { display: block; width: 104px; height: 4px; margin: 0 auto; border-radius: 4px; background: var(--ink); }

.chat-bubble { padding: 12px 15px; margin-bottom: 12px; background: var(--ink); color: #fff; font-size: 15px; line-height: 1.65; border-radius: 16px 16px 3px 16px; }
.assistant-bubble { padding: 13px 15px; background: #fff; border: 1px solid var(--line); border-radius: 3px 16px 16px 16px; font-size: 15px; line-height: 1.7; }
.assistant-bubble b { display: flex; align-items: center; gap: 6px; margin-bottom: 6px; font-size: 12px; color: var(--ink); }
.assistant-bubble b::before { content: ""; width: 8px; height: 8px; background: var(--accent); outline: 1px solid var(--ink); }
.voice-area { margin-top: 18px; text-align: center; }
.mic-circle { display: grid; place-items: center; width: 64px; height: 64px; margin: auto; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 9px rgba(var(--accent-rgb), .25); }
.mic-circle svg { width: 26px; height: 26px; fill: none; stroke: var(--ink); stroke-width: 1.8; }
.waveform { display: flex; justify-content: center; align-items: center; gap: 4px; height: 22px; margin-top: 12px; }
.waveform span { width: 3px; height: 9px; background: var(--ink); }
.waveform span:nth-child(2n) { height: 18px; }
.waveform.is-playing span { animation: wave .7s infinite alternate; }
.waveform.is-playing span:nth-child(2n) { animation-delay: .2s; }
.waveform.is-playing span:nth-child(3n) { animation-delay: .4s; }
.demo-play { width: 100%; min-height: 44px; margin-top: 12px; padding: 8px; border: 1px solid var(--ink); background: #fff; font-size: 14px; font-weight: 700; cursor: pointer; transition: background .2s; }
.demo-play:hover:not(:disabled) { background: var(--accent); }
.demo-play:disabled { cursor: progress; color: var(--mute); border-color: var(--line-2); }
.check-row { display: flex; align-items: center; gap: 10px; margin: 10px 0; font-size: 15px; }
.check-row i { display: grid; place-items: center; min-width: 26px; height: 22px; font: 700 11px var(--f-latin); font-style: normal; background: var(--ink); color: var(--accent); }
.scan-frame { position: relative; margin-bottom: 12px; padding: 20px 28px 14px; background: var(--gray); text-align: center; }
.scan-frame::before, .scan-frame::after { content: ""; position: absolute; width: 18px; height: 18px; border: 2px solid var(--ink); }
.scan-frame::before { left: 8px; top: 8px; border-right: 0; border-bottom: 0; }
.scan-frame::after { right: 8px; bottom: 8px; border-left: 0; border-top: 0; }
.medicine-box { display: grid; place-items: center; padding: 22px 8px; background: #fff; border-left: 12px solid var(--accent); box-shadow: 5px 6px 0 var(--gray-2); font-size: 16px; font-weight: 700; letter-spacing: .1em; }
.medicine-box small { font-size: 11px; font-weight: 400; letter-spacing: .04em; color: var(--mute); }
.scan-frame > small { display: block; margin-top: 12px; font-size: 12px; color: var(--mute); }
.warning-tag { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 12px; padding: 6px 10px; background: var(--warn); font-size: 13px; font-weight: 700; }

.stage-info { display: grid; gap: 16px; padding-top: 20px; }
.stage-caption { display: flex; align-items: center; gap: 18px; }
.counter { font: 600 14px var(--f-latin); letter-spacing: .08em; color: var(--mute); font-variant-numeric: tabular-nums; }
.counter b { font-size: 26px; color: var(--ink); font-weight: 700; }
.stage-nav { margin-left: auto; display: flex; gap: 10px; }
.spec-chips { display: flex; flex-wrap: wrap; gap: 10px 24px; margin: 0; }
.spec-chips div { display: flex; align-items: stretch; }
.spec-chips dt { display: grid; place-items: center; padding: 4px 10px; background: var(--ink); color: #fff; font-size: 13px; font-weight: 700; }
.spec-chips dd { display: grid; place-items: center; margin: 0; padding: 4px 12px; border: 1px solid var(--ink); border-left: 0; font-size: 14px; background: var(--white); }
.feature-description { margin: 0; min-height: 3.6em; font-size: 17px; line-height: 1.8; color: var(--ink); }

/* ---------- 黄色分隔带 ---------- */
.band { position: relative; display: flex; align-items: center; gap: 28px; min-height: 132px; padding: 18px var(--pad); background: var(--accent); overflow: hidden; }
.band-art { width: 180px; height: 96px; flex-shrink: 0; fill: none; stroke: var(--ink); stroke-width: 1.6; stroke-linejoin: round; }
.band-text { display: grid; gap: 2px; }
.band-text small { font: 700 12px var(--f-latin); letter-spacing: .14em; }
.band-text strong { font: 900 clamp(34px, 4.4vw, 62px)/1 var(--f-latin); font-stretch: 125%; letter-spacing: -.01em; }
.band-cn { padding: 4px 12px; background: var(--ink); color: var(--accent); font-size: 16px; font-weight: 700; letter-spacing: .12em; }
.band .chevrons { margin-left: auto; width: 180px; height: 14px; }

/* ---------- 使用方式（深色） ---------- */
.journey { background: var(--ink-2); color: var(--on-dark); }
.journey-top { display: flex; justify-content: space-between; align-items: end; gap: 40px; }
.journey h2 span { color: var(--on-dark-3); }
.journey-top > p { margin: 0 0 6px; font-size: 17px; line-height: 1.9; color: var(--on-dark-2); }
.journey-steps { list-style: none; margin: 64px 0 40px; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line-dark); counter-reset: step; }
.journey-steps > li { position: relative; padding: 28px 36px 34px; border-right: 1px solid var(--line-dark); transition: background .3s; }
.journey-steps > li:first-child { padding-left: 0; }
.journey-steps > li:last-child { border-right: 0; }
.journey-steps > li:hover { background: rgba(255, 255, 255, .03); }
.journey-steps > li:not(:last-child)::after { content: ""; position: absolute; right: -9px; top: 46px; width: 18px; height: 18px; background: var(--accent); clip-path: polygon(0 0, 55% 0, 100% 50%, 55% 100%, 0 100%, 45% 50%); z-index: 2; }
.step-head { display: flex; align-items: baseline; gap: 12px; }
.step-num { font: 300 64px/1 var(--f-latin); font-stretch: 125%; color: var(--accent); letter-spacing: -.02em; }
.step-en { font: 700 12px var(--f-latin); font-stretch: 125%; letter-spacing: .14em; color: var(--on-dark-3); }
.step-icon { width: 78px; height: 78px; margin: 32px 0 18px; fill: none; stroke: var(--on-dark); stroke-width: 1.5; }
.journey-steps h3 { margin: 0 0 10px; font-size: 24px; font-weight: 700; letter-spacing: .06em; }
.journey-steps p { margin: 0; font-size: 16px; line-height: 1.85; color: var(--on-dark-2); }
.journey-note { display: flex; justify-content: space-between; align-items: center; gap: 30px; padding-top: 22px; border-top: 1px solid var(--line-dark); }
.journey-note > span { font: 700 12px var(--f-latin); font-stretch: 125%; letter-spacing: .12em; color: var(--accent); }
.journey-note p { margin: 0; font-size: 14px; color: var(--on-dark-2); }

/* ---------- 关于项目 ---------- */
.about-layout { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(36px, 6vw, 110px); }
.about-title { position: sticky; top: 40px; align-self: start; }
.about-mark { width: 92px; height: 95px; margin-bottom: 30px; fill: var(--ink); }
.project-label { display: inline-flex; gap: 8px; margin-top: 28px; padding: 6px 10px; border: 1px solid var(--line-2); font: 600 12px var(--f-latin); letter-spacing: .08em; color: var(--mute); }
.project-label i { font-style: normal; color: var(--ink); }
.about-lead { margin: 4px 0 18px; font-size: 26px; font-weight: 700; letter-spacing: .04em; }
.pain-tiles { list-style: none; margin: 0 0 34px; padding: 0; display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.pain-tiles li { position: relative; display: grid; gap: 4px; padding: 16px 16px 14px; background: var(--white); border: 1px solid var(--line); border-top: 4px solid var(--ink); }
.pain-tiles li:nth-child(2) { border-top-color: var(--accent); }
.pt-num { font: 700 12px var(--f-latin); letter-spacing: .1em; color: var(--mute-2); }
.pain-tiles strong { font: 900 clamp(28px, 2.6vw, 40px)/1.2 var(--f-display); }
.pain-tiles small { font: 700 10px var(--f-latin); font-stretch: 125%; letter-spacing: .12em; color: var(--mute-2); }
.about-body { margin: 0 0 30px; font-size: 17px; line-height: 2; color: var(--mute); }
.data-sheet { margin: 0; border-top: 1px solid var(--ink); }
.data-sheet div { display: grid; grid-template-columns: 150px 1fr; align-items: center; gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--line); }
.data-sheet dt { display: inline-flex; align-items: center; gap: 10px; justify-self: start; padding: 5px 10px 5px 6px; background: var(--ink); color: #fff; font-size: 14px; font-weight: 700; letter-spacing: .06em; }
.data-sheet dt span { padding: 1px 5px; background: var(--accent); color: var(--ink); font: 700 11px var(--f-latin); }
.data-sheet dd { margin: 0; font-size: 17px; font-weight: 600; }
.about-note { margin: 16px 0 0; font-size: 13px; color: var(--mute); }

/* ---------- 下载 ---------- */
.download { display: grid; grid-template-columns: 76px 1fr; gap: clamp(28px, 4vw, 64px); padding-left: clamp(24px, 3vw, 48px); background: var(--white); border-top: 1px solid var(--line); }
.dl-strip { display: flex; flex-direction: column; align-items: center; gap: 14px; padding: 22px 0; background: var(--accent); align-self: stretch; max-height: 560px; }
.dl-strip-cn { writing-mode: vertical-rl; font: 900 26px/1 var(--f-display); letter-spacing: .1em; }
.dl-strip i { width: 28px; height: 2px; background: var(--ink); }
.dl-strip-en { writing-mode: vertical-rl; font: 900 24px/1 var(--f-latin); font-stretch: 125%; }
.download-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 100px); align-items: center; }
.download-eyebrow { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 22px; padding: 6px 12px; background: var(--ink); color: #fff; font-size: 14px; font-weight: 700; letter-spacing: .06em; }
.dl-copy > p:last-child { margin: 24px 0 0; font-size: 17px; line-height: 1.9; color: var(--mute); }
.dl-dock { position: relative; padding: 28px; background: var(--ink-2); color: #fff; clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%); }
.dock-tile { position: relative; display: flex; align-items: center; gap: 18px; padding-bottom: 24px; margin-bottom: 8px; border-bottom: 1px solid var(--line-dark); }
.app-icon { display: grid; place-items: center; width: 72px; height: 72px; background: var(--accent); border-radius: 16px; }
.app-icon svg { width: 40px; height: 41px; fill: var(--ink); }
.dock-tile h3 { margin: 0 0 4px; font: 900 26px/1.2 var(--f-display); letter-spacing: .04em; }
.dock-tile div > span { font: 700 11px var(--f-latin); font-stretch: 125%; letter-spacing: .1em; color: var(--on-dark-3); }
.dock-meta { margin: 0 0 22px; }
.dock-meta div { display: flex; justify-content: space-between; gap: 20px; padding: 14px 0; border-bottom: 1px solid var(--line-dark); font-size: 16px; }
.dock-meta dt { color: var(--on-dark-2); }
.dock-meta dd { margin: 0; font-weight: 700; }
.dock-hint { margin: 14px 0 0; font-size: 14px; line-height: 1.8; color: var(--on-dark-2); }
.download-live { width: 100%; }
.download-action { display: grid; gap: 12px; }
.platform-download { min-width: 0; gap: 16px; padding-top: 16px; padding-bottom: 16px; }
.download-file { display: grid; gap: 6px; min-width: 0; }
.download-file strong { font-size: 16px; line-height: 1.5; font-weight: 700; white-space: normal; }
.download-file small { font-size: 12px; line-height: 1.6; font-weight: 500; letter-spacing: .02em; white-space: normal; }
.platform-download > svg { flex-shrink: 0; }

/* ---------- 页脚 ---------- */
.site-footer { margin-left: var(--rail); padding: 0 var(--pad) 36px; background: var(--ink); color: var(--on-dark); overflow: hidden; }
.footer-mark { padding: 28px 0 10px; font: 900 clamp(48px, 9.6vw, 170px)/1 var(--f-latin); font-stretch: 125%; letter-spacing: -.02em; color: transparent; -webkit-text-stroke: 1px var(--ink-4); white-space: nowrap; }
.footer-row { display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; padding: 24px 0; border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.footer-brand { display: inline-flex; align-items: center; gap: 12px; font: 900 22px var(--f-display); color: #fff; }
.footer-brand svg { width: 26px; height: 27px; fill: var(--accent); }
.footer-brand span { font: 700 11px var(--f-latin); font-stretch: 125%; letter-spacing: .1em; color: var(--on-dark-3); }
.footer-nav { display: flex; flex-wrap: wrap; gap: 4px 28px; font-size: 15px; }
.footer-nav a { padding: 6px 0; border-bottom: 1px solid transparent; transition: border-color .2s, color .2s; }
.footer-nav a:hover { color: var(--accent); border-color: var(--accent); }
.footer-top { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 14px; border: 1px solid var(--line-dark); font-size: 15px; transition: background .2s, color .2s; }
.footer-top svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; }
.footer-top svg use { fill: none; }
.footer-top:hover { background: var(--accent); color: var(--ink); }
.footer-legal { margin: 20px 0 0; font-size: 13px; line-height: 1.8; color: var(--on-dark-3); }

/* ---------- 进场动效（仅在脚本可用时） ---------- */
.js [data-reveal] { opacity: 0; transform: translateY(26px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.js [data-reveal="wipe"] { opacity: 1; transform: none; clip-path: inset(-20% 100% -20% 0); transition: clip-path 1s var(--ease); }
.js [data-reveal].is-in { opacity: 1; transform: none; }
.js [data-reveal="wipe"].is-in { clip-path: inset(-20% -6% -20% 0); }
.js .hero-title .line:nth-child(2) { transition-delay: .15s; }
.js .hero-sub { transition-delay: .25s; }
.js .hero-actions { transition-delay: .35s; }
.js .journey-steps li:nth-child(2) { transition-delay: .12s; }
.js .journey-steps li:nth-child(3) { transition-delay: .24s; }

@keyframes hero-in { from { transform: scale(1.06); opacity: .25; } to { transform: scale(1); opacity: 1; } }
@keyframes scroll-drop { from { top: -14px; } to { top: 38px; } }
@keyframes marquee { to { transform: translateX(-50%); } }
@keyframes wave { to { height: 3px; opacity: .45; } }
@keyframes blink { to { opacity: 0; } }
@keyframes scan { 0% { top: -2%; opacity: 1; } 100% { top: 102%; opacity: .8; } }

/* ---------- 响应式 ---------- */
@media (min-width: 1700px) {
  :root { --rail: 108px; }
  body { font-size: 18px; }
}
@media (max-width: 1240px) {
  :root { --rail: 84px; }
  .hero-content { padding-left: 72px; }
  .hero-dock { right: 32px; }
  .dock-main { min-width: 190px; }
  .product-stage { padding-left: 16px; padding-right: 80px; }
  .phone { width: 292px; }
  .stage-label { display: none; }
}
@media (max-width: 1080px) {
  .features-layout { grid-template-columns: 1fr; }
  .features-copy { position: static; }
  .feature-tabs { max-width: 640px; }
  .feature-tab.selected::before { display: none; }
  .hero-dock { bottom: 100px; }
  .hero-dock .dock-app { display: none; }
  .about-layout { grid-template-columns: 1fr; }
  .about-title { position: static; }
  .marquee-meta { justify-content: center; }
  .marquee-meta > span:not(.cn) { display: none; }
  .download-layout { grid-template-columns: 1fr; }
  .journey-steps > li { padding: 26px 24px 30px; }
}
@media (max-width: 860px) and (min-width: 761px) {
  .journey-top { display: block; }
  .journey-top > p { margin-top: 20px; }
}
@media (max-height: 820px) and (min-width: 761px) {
  .primary-nav { margin-top: 6px; }
  .nav-link { padding-top: 10px; padding-bottom: 9px; }
  .nav-en { display: none; }
  .rail-progress { height: 44px; }
}

@media (max-width: 760px) {
  :root { --rail: 0px; --pad: 22px; }
  body { font-size: 16px; }
  html { scroll-padding-top: 64px; }
  .rail { inset: 0 0 auto 0; width: auto; height: 64px; flex-direction: row; align-items: center; justify-content: space-between; padding: 0 12px 0 18px; border-right: 0; border-bottom: 1px solid var(--line); }
  .rail-logo { flex-direction: row; gap: 10px; padding: 0; border: 0; }
  .logo-mark { width: 28px; height: 29px; }
  .logo-text { font-size: 18px; }
  .logo-text br { display: none; }
  .menu-toggle { display: inline-flex; align-items: center; gap: 10px; min-height: 46px; padding: 0 14px; border: 1px solid var(--ink); background: transparent; cursor: pointer; font-size: 16px; font-weight: 700; }
  .menu-lines { display: grid; gap: 6px; width: 20px; }
  .menu-lines i { display: block; height: 2px; background: currentColor; transition: transform .25s var(--ease); }
  .menu-toggle[aria-expanded="true"] { background: var(--ink); color: #fff; }
  .menu-toggle[aria-expanded="true"] .menu-lines i:first-child { transform: translateY(4px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] .menu-lines i:last-child { transform: translateY(-4px) rotate(-45deg); }
  .primary-nav { display: none; position: fixed; top: 64px; left: 0; right: 0; bottom: 0; margin: 0; padding: 12px 22px 28px; overflow-y: auto; background: var(--ink); color: #fff; }
  .primary-nav.open { display: flex; animation: menu-in .3s var(--ease); }
  .nav-link { grid-template-columns: 56px 1fr auto; justify-items: start; align-items: center; padding: 18px 0; border-bottom: 1px solid var(--line-dark); color: #fff; }
  .nav-link:hover { background: transparent; color: var(--accent); }
  .nav-num { font-size: 14px; color: var(--accent); padding: 0; }
  .nav-cn { font-size: 26px; font-family: var(--f-display); font-weight: 900; }
  .nav-en { font-size: 11px; color: var(--on-dark-3); }
  .nav-link.active { background: transparent; }
  .nav-link.active .nav-num { background: var(--accent); color: var(--ink); padding: 3px 6px; }
  .nav-link.active::after { display: none; }
  .nav-cta { display: flex; align-items: center; justify-content: space-between; margin-top: 26px; min-height: 60px; padding: 0 20px; background: var(--accent); color: var(--ink); font-size: 18px; font-weight: 800; }
  .nav-cta svg { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 2; }
  .nav-cta svg use { fill: none; }
  .rail-foot { display: none; }
  main, .site-footer { margin-left: 0; }
  main { padding-top: 64px; }

  .hero { height: calc(100svh - 64px); min-height: 700px; max-height: 960px; }
  .hero-art img { object-position: 66% center; }
  .hero-shade { background: linear-gradient(180deg, rgba(var(--ink-rgb), .64) 0%, rgba(var(--ink-rgb), .32) 45%, rgba(var(--ink-rgb), .88) 100%); }
  .hud-column, .hud-marker, .hud-corner.tl, .hud-corner.tr { display: none; }
  .hud-corner.bl { left: 12px; bottom: 12px; }
  .hud-corner.br { right: 12px; bottom: 12px; }
  .hero-top { height: 52px; padding: 0 22px; }
  .hero-path { font-size: 11px; }
  .hero-path i { padding: 0 6px; }
  .hero-tag { font-size: 12px; padding: 4px 8px; gap: 6px; }
  .hero-tag .dot { width: 6px; height: 6px; }
  .hero-content { padding: 96px 22px 0; }
  .kicker { font-size: 11px; }
  .hero-title { font-size: clamp(50px, 15vw, 68px); margin: 18px 0 18px; }
  .hero-sub { font-size: 16px; }
  .hero-actions { gap: 12px; margin-top: 28px; }
  .hero-actions .btn { min-width: 0; flex: 1 1 150px; min-height: 56px; font-size: 16px; gap: 14px; }
  .hero-dock { left: 22px; right: 22px; bottom: 76px; }
  .dock-main { flex: 1; min-width: 0; grid-template-columns: 1fr auto; align-items: center; column-gap: 12px; }
  .dock-head { grid-column: 1; }
  .dock-status { grid-column: 1; font-size: 15px; }
  .dock-link { grid-column: 2; grid-row: 1 / 3; }
  .hero-foot { left: 22px; right: 22px; bottom: 22px; }
  .scroll-cue { font-size: 13px; gap: 10px; }
  .scroll-cue small { display: none; }
  .scroll-line { height: 26px; }
  .concept-label { font-size: 11px; text-align: right; }

  .marquee-track { padding-top: 12px; font-size: 64px; animation-duration: 26s; }
  .marquee-meta { flex-wrap: wrap; justify-content: center; font-size: 10px; gap: 8px 16px; }
  .marquee-meta > span:not(.cn) { display: none; }

  .section { padding: 44px var(--pad) 56px; }
  .tissue::before { background-size: 880px auto; }
  .sec-head { grid-template-columns: 1fr; margin-bottom: 34px; padding-bottom: 16px; }
  .sec-cn { font-size: 24px; }
  .sec-index { display: none; }
  .features h2, .about h2, .download h2, .team h2, .journey h2 { font-size: clamp(34px, 10vw, 44px); }
  .lede { font-size: 16px; margin: 18px 0 26px; }
  .feature-tab { grid-template-columns: 44px 1fr 22px; min-height: 68px; gap: 10px; }
  .ft-name { flex-direction: column; gap: 0; }
  .ft-name strong { font-size: 18px; }
  .ft-name small { font-size: 13px; }
  .product-stage { min-height: 0; padding: 54px 70px 40px 10px; }
  .stage-strip { width: 52px; }
  .stage-strip span { font-size: 22px; }
  .stage-strip .barcode { width: 26px; }
  .stage-hud { right: 60px; left: 12px; gap: 10px; }
  .stage-hud .chevrons { width: 60px; }
  .stage-cross.c1 { right: 64px; }
  .stage-hatch { right: 52px; font-size: 92px; }
  .phone { width: min(292px, 100%); min-height: 560px; border-width: 7px; }
  .phone-content { padding: 18px 16px 32px; }
  .phone h3 { font-size: 25px; }
  .chat-bubble, .assistant-bubble, .check-row { font-size: 14px; }
  .stage-caption { flex-wrap: wrap; gap: 12px; }
  .feature-description { font-size: 16px; }

  .band { flex-wrap: wrap; gap: 10px 16px; min-height: 0; padding: 20px var(--pad); }
  .band-art { width: 110px; height: 60px; }
  .band-text strong { font-size: 30px; }
  .band .chevrons { display: none; }

  .journey-top { display: block; }
  .journey-top > p { margin-top: 18px; font-size: 16px; }
  .journey-top > p br { display: none; }
  .journey-steps { grid-template-columns: 1fr; margin: 34px 0 30px; }
  .journey-steps > li, .journey-steps > li:first-child { display: grid; grid-template-columns: 70px 1fr; column-gap: 18px; padding: 22px 0; border-right: 0; border-bottom: 1px solid var(--line-dark); }
  .journey-steps > li::after { display: none; }
  .step-head { grid-column: 1 / -1; margin-bottom: 14px; }
  .step-num { font-size: 44px; }
  .step-icon { grid-row: 2 / 4; width: 62px; height: 62px; margin: 2px 0 0; }
  .journey-steps h3 { font-size: 20px; margin-bottom: 6px; }
  .journey-steps p { font-size: 15px; }
  .journey-note { display: block; }
  .journey-note p { margin-top: 12px; font-size: 13px; }

  .about-mark { width: 64px; height: 66px; margin-bottom: 22px; }
  .about-lead { font-size: 21px; }
  .pain-tiles { gap: 6px; }
  .pain-tiles li { padding: 12px 10px 10px; }
  .pain-tiles strong { font-size: 24px; }
  .pain-tiles small { font-size: 8px; letter-spacing: .06em; }
  .about-body { font-size: 16px; }
  .data-sheet div { grid-template-columns: 1fr; gap: 10px; }
  .data-sheet dd { font-size: 16px; }

  .download { grid-template-columns: 1fr; padding-left: var(--pad); }
  .dl-strip { flex-direction: row; justify-content: flex-start; padding: 10px 16px; max-height: none; }
  .dl-strip-cn, .dl-strip-en { writing-mode: horizontal-tb; font-size: 18px; }
  .dl-strip i { width: 2px; height: 18px; }
  .dl-dock { padding: 22px 18px; }
  .app-icon { width: 60px; height: 60px; border-radius: 14px; }
  .app-icon svg { width: 32px; height: 33px; }
  .dock-tile h3 { font-size: 22px; }
  .dock-meta div { font-size: 15px; }
  .btn-disabled { font-size: 15px; white-space: normal; text-align: left; }

  .footer-mark { font-size: 48px; padding-top: 22px; }
  .footer-row { gap: 18px; }
  .footer-nav { order: 3; flex-basis: 100%; gap: 4px 20px; }
}
@media (max-width: 370px) {
  .hero-title { font-size: 46px; }
  .hero-path { display: none; }
  .hero-top { justify-content: flex-end; }
  .product-stage { padding-right: 58px; }
  .stage-strip { width: 44px; }
  .phone { min-height: 540px; }
  .pain-tiles strong { font-size: 21px; }
}
@keyframes menu-in { from { opacity: 0; transform: translateY(-8px); } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js [data-reveal] { opacity: 1; transform: none; clip-path: none; }
  .marquee-track { transform: none; }
}