/* =========================================================
   阡陌栖科技 · 官网  styles.css  v2（比赛级）
   暖黑底 / 暖白字 / 品牌蓝 · 全屏分屏 · 大胆而克制的动效
   ========================================================= */

:root {
  --bg:        #07080C;
  --bg-soft:   #0C0E14;
  --bg-raise:  #10131B;
  --fg:        #F2F1EC;
  --muted:     rgba(242, 241, 236, 0.56);
  --faint:     rgba(242, 241, 236, 0.32);
  --hairline:  rgba(242, 241, 236, 0.12);
  --hairline-2:rgba(242, 241, 236, 0.22);

  --blue:      #1B5DD8;
  --blue-2:    #2E7CF6;
  --cyan:      #00C2FF;
  --indigo:    #6B5CFF;
  --mint:      #00D4A0;

  --font-display: "Syne", "Noto Sans SC", sans-serif;
  --font-sans:    "Noto Sans SC", "Syne", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, monospace;

  --pad-x: clamp(1.25rem, 5vw, 6rem);

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-io: cubic-bezier(0.65, 0, 0.35, 1);
  --t-fast: 250ms;
  --t-mid: 700ms;
  --t-slow: 1100ms;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-snap-type: y proximity;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden; /* 防止任何绝对定位装饰元素（如背景章节号）把页面撑出水平滚动 */
}

/* 整屏吸附只在桌面（精确指针+宽屏）生效，手机端保持常规自由滚动 */
@media (min-width: 1024px) and (pointer: fine) {
  html { scroll-snap-type: y mandatory; }
}

/* 手机端：彻底关闭滚动吸附，恢复完全自由的惯性滚动 */
@media (max-width: 720px) {
  html { scroll-snap-type: none; }
  .slide { scroll-snap-align: none; }
}

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.6;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}
body.js-lock { overflow: hidden; }

::selection { background: var(--blue); color: #fff; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
@media (hover:hover) and (pointer:fine) { body, a, button, input, textarea, label { cursor: none; } }

/* ============ 颗粒 / 噪点质感 ============ */
.grain {
  position: fixed; inset: -50%; z-index: 1500; pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: 0.05; mix-blend-mode: overlay;
  animation: grain 8s steps(10) infinite;
}
@keyframes grain {
  0%,100%{transform:translate(0,0)} 10%{transform:translate(-5%,-5%)}
  30%{transform:translate(3%,-2%)} 50%{transform:translate(-2%,4%)}
  70%{transform:translate(4%,2%)} 90%{transform:translate(-3%,3%)}
}

/* ============ 滚动进度条 ============ */
.progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%;
  background: linear-gradient(90deg, var(--blue-2), var(--cyan));
  z-index: 1200; box-shadow: 0 0 12px rgba(0,194,255,.6);
}

/* ============ 自定义光标 ============ */
.cursor-dot {
  position: fixed; top: 0; left: 0; width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan); z-index: 2002; pointer-events: none;
  transform: translate(-50%,-50%);
}
.cursor-ring {
  position: fixed; top: 0; left: 0; width: 34px; height: 34px; border-radius: 50%;
  border: 1px solid rgba(242,241,236,.6); z-index: 2001; pointer-events: none;
  transform: translate(-50%,-50%);
  display: grid; place-items: center;
  transition: width var(--t-fast) var(--ease), height var(--t-fast) var(--ease),
              background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
  mix-blend-mode: difference;
}
.cursor-ring__label {
  font-family: var(--font-mono); font-size: 0.6rem; letter-spacing: .08em;
  color: var(--bg); opacity: 0; transition: opacity var(--t-fast) var(--ease);
}
.cursor-ring.is-hover { width: 56px; height: 56px; background: var(--fg); border-color: var(--fg); mix-blend-mode: normal; }
.cursor-ring.is-label { width: 88px; height: 88px; background: var(--fg); border-color: var(--fg); mix-blend-mode: normal; border-radius: 999px; }
.cursor-ring.is-label .cursor-ring__label { opacity: 1; color: var(--bg); }
@media (hover:none), (pointer:coarse) { .cursor-dot, .cursor-ring { display: none; } }

/* ============ 预加载 ============ */
.preloader { position: fixed; inset: 0; z-index: 3000; display: none; }
.js .preloader { display: block; }
.preloader__panel { position: absolute; left: 0; width: 100%; height: 50.5%; background: var(--bg-raise); transition: transform .9s var(--ease-io); }
.preloader__panel--top { top: 0; }
.preloader__panel--bot { bottom: 0; }
.preloader.is-done .preloader__panel--top { transform: translateY(-101%); }
.preloader.is-done .preloader__panel--bot { transform: translateY(101%); }
.preloader__content {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  transition: opacity .5s var(--ease), transform .5s var(--ease);
}
.preloader.is-done .preloader__content { opacity: 0; transform: translateY(-20px); }
.preloader__count { font-family: var(--font-display); font-weight: 800; font-size: clamp(1.8rem,5vw,3rem); line-height: 1; font-variant-numeric: tabular-nums; }
.preloader__count span::after { content: "%"; font-size: .4em; color: var(--cyan); margin-left: .1em; }
.preloader__brand { font-family: var(--font-sans); font-weight: 900; font-size: 1.3rem; letter-spacing: .3em; }
.preloader__sub { font-family: var(--font-mono); font-size: .66rem; letter-spacing: .34em; color: var(--faint); }

.preloader__foot {
  position: absolute; left: 0; right: 0; bottom: clamp(1.6rem, 5vh, 3.2rem);
  display: flex; flex-direction: column; align-items: center; gap: .8rem;
}

/* Logo 图片 */
.preloader__logo {
  width: clamp(110px, 15vw, 150px); height: auto; display: block;
  opacity: 0; transform: translateY(12px);
  animation: plLogoIn 1.1s .2s var(--ease) forwards;
}
@keyframes plLogoIn { to { opacity: 1; transform: none; } }

.nav__logo { height: 34px; width: auto; display: block; }

/* ============ 顶部导航 ============ */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 1000;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.1rem var(--pad-x);
  transition: background .5s var(--ease), backdrop-filter .5s var(--ease);
}
.nav.is-scrolled { background: rgba(7,8,12,.55); backdrop-filter: blur(12px); border-bottom: 1px solid var(--hairline); }
.nav__brand { display: flex; align-items: center; gap: .6rem; }
.nav__links { display: flex; gap: 4rem; }
.nav__links a { font-size: .9rem; font-weight: 400; position: relative; padding: .2rem 0; }
.nav__links a span { position: relative; }
.nav__links a span::before {
  content: attr(data-num); position: absolute; top: -.9em; left: 0;
  font-family: var(--font-mono); font-size: .58rem; color: var(--cyan); opacity: 0;
  transition: opacity var(--t-fast) var(--ease);
}
.nav__links a:hover span::before { opacity: 1; }
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; width: 100%; height: 1px;
  background: var(--fg); transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-fast) var(--ease);
}
.nav__links a:hover::after { transform: scaleX(1); }
.nav__cta {
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .12em;
  border: 1px solid var(--hairline-2); padding: .55rem 1.15rem; border-radius: 999px;
  position: relative; overflow: hidden;
}
.nav__cta span { position: relative; z-index: 1; transition: color var(--t-fast) var(--ease); }
.nav__cta::before {
  content: ""; position: absolute; inset: 0; background: var(--fg);
  transform: translateY(101%); transition: transform var(--t-fast) var(--ease);
}
.nav__cta:hover::before { transform: translateY(0); }
.nav__cta:hover span { color: var(--bg); }
@media (max-width: 720px) { .nav__links { display: none; } }

/* ============ 右侧圆点导航 ============ */
.dots { position: fixed; right: clamp(.9rem,2vw,1.8rem); top: 50%; transform: translateY(-50%); z-index: 1000; display: flex; flex-direction: column; gap: .95rem; }
.dots__item { position: relative; width: 12px; height: 12px; display: grid; place-items: center; }
.dots__item span { width: 7px; height: 7px; border-radius: 50%; background: var(--hairline-2); transition: background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease); }
.dots__item.is-active span { background: var(--cyan); transform: scale(1.5); }
.dots__item::before {
  content: attr(data-label); position: absolute; right: 22px; top: 50%; transform: translateY(-50%);
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .1em; color: var(--muted);
  white-space: nowrap; opacity: 0; transition: opacity var(--t-fast) var(--ease); pointer-events: none;
}
.dots__item:hover::before { opacity: 1; }
@media (max-width: 720px) { .dots { display: none; } }

/* ============ 分屏容器 ============ */
.deck { position: relative; }
.slide {
  position: relative; min-height: 100vh; min-height: 100svh;
  scroll-snap-align: start; display: flex; align-items: center;
  padding: clamp(6rem, 11vh, 8rem) var(--pad-x);
  border-bottom: 1px solid var(--hairline); overflow: hidden;
}
.slide:nth-child(even) { background: var(--bg-soft); }
.slide__inner { width: 100%; max-width: 1240px; margin: 0 auto; position: relative; z-index: 2; }

.slide__num {
  position: absolute; top: 50%; right: -2%; transform: translateY(-50%);
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(14rem, 34vw, 30rem); line-height: 1; z-index: 1;
  color: transparent; -webkit-text-stroke: 1px rgba(242,241,236,.06);
  pointer-events: none; user-select: none;
}

/* ============ 进场揭示（块级） ============ */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease); will-change: opacity, transform; }
.reveal.is-in { opacity: 1; transform: none; }

/* 字符级 stagger */
[data-split] .char { display: inline-block; opacity: 0; transform: translateY(110%) rotate(4deg); transition: opacity .8s var(--ease), transform .8s var(--ease); transition-delay: calc(var(--i) * 34ms); will-change: transform, opacity; }
[data-split].is-in .char { opacity: 1; transform: none; }

/* 错峰（卡片网格） */
.svc-grid .reveal:nth-child(2), .works .reveal:nth-child(2) { transition-delay: 80ms; }
.svc-grid .reveal:nth-child(3), .works .reveal:nth-child(3) { transition-delay: 160ms; }
.svc-grid .reveal:nth-child(4) { transition-delay: 240ms; }
.svc-grid .reveal:nth-child(5) { transition-delay: 320ms; }
.svc-grid .reveal:nth-child(6) { transition-delay: 400ms; }

/* ============ 区块标题 ============ */
.sec-head { margin-bottom: clamp(2.2rem, 5vh, 3.6rem); max-width: 760px; position: relative; }
.sec-head::after { content: ""; position: absolute; left: 0; bottom: -1rem; width: 64px; height: 1px; background: var(--cyan); transform: scaleX(0); transform-origin: left; transition: transform .9s .3s var(--ease); }
.sec-head.is-in::after, .slide.is-in .sec-head::after { transform: scaleX(1); }
.sec-head__no { font-family: var(--font-mono); font-size: .78rem; letter-spacing: .3em; color: var(--cyan); }
.sec-head__title { font-family: var(--font-sans); font-weight: 700; font-size: clamp(1.9rem, 4.5vw, 3.2rem); line-height: 1.1; margin: .6rem 0 .8rem; letter-spacing: -.01em; overflow: hidden; }
.sec-head__desc { color: var(--muted); font-size: clamp(.95rem, 1.4vw, 1.1rem); }

/* ============ HERO ============ */
.slide--hero { padding: 0 var(--pad-x); }
.flow { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero__glow { position: absolute; top: 50%; left: 50%; width: 70vmin; height: 70vmin; transform: translate(-50%,-50%); background: radial-gradient(circle, rgba(27,93,216,.22), transparent 62%); filter: blur(10px); z-index: 0; pointer-events: none; }
.hero__inner { position: relative; z-index: 2; max-width: 1100px; }
.eyebrow { display: inline-flex; align-items: center; gap: .6rem; font-family: var(--font-mono); font-size: .76rem; letter-spacing: .18em; color: var(--muted); margin-bottom: 1.8rem; }
.eyebrow__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 10px var(--mint); animation: pulse 2s var(--ease) infinite; }
@keyframes pulse { 0%,100%{transform:scale(1);opacity:1} 50%{transform:scale(1.5);opacity:.5} }

.hero__title { font-family: var(--font-sans); font-weight: 900; font-size: clamp(3rem, 12vw, 9rem); line-height: .96; letter-spacing: -.02em; }
.hero__row { display: block; overflow: hidden; padding-bottom: .06em; }

.hero__rotator { display: flex; align-items: baseline; gap: .7rem; margin-top: 1.6rem; font-size: clamp(1rem, 1.8vw, 1.3rem); }
.hero__rotator-label { color: var(--muted); }
.hero__rotator-window { display: inline-block; height: 1.4em; overflow: hidden; }
.hero__rotator-word { display: inline-block; color: var(--cyan); font-weight: 500; transition: transform .5s var(--ease), opacity .5s var(--ease); }
.hero__rotator-word.is-out { transform: translateY(-110%); opacity: 0; }
.hero__rotator-word.is-in { transform: none; opacity: 1; }

.hero__lead { margin-top: 1.4rem; font-size: clamp(1rem, 1.8vw, 1.3rem); color: var(--muted); max-width: 32ch; }
.hero__actions { margin-top: 2.3rem; display: flex; gap: 1rem; flex-wrap: wrap; }
.hero__meta { margin-top: 2.6rem; display: flex; gap: 1.6rem; flex-wrap: wrap; }
.hero__meta li { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .12em; color: var(--faint); padding-left: 1.1rem; position: relative; }
.hero__meta li::before { content: "◆"; position: absolute; left: 0; color: var(--cyan); font-size: .6em; top: .35em; }

/* marquee */
.hero__marquee { position: absolute; left: 0; right: 0; bottom: 0; z-index: 3; border-top: 1px solid var(--hairline); padding: 1.1rem 0; overflow: hidden; background: rgba(7,8,12,.4); backdrop-filter: blur(6px); }
.marquee__track { display: flex; width: max-content; align-items: center; white-space: nowrap; animation: marquee 26s linear infinite; will-change: transform; }
.marquee__group { display: flex; align-items: center; gap: 2.6rem; padding-right: 2.6rem; flex-shrink: 0; }
.marquee__track span { font-family: var(--font-sans); font-weight: 500; font-size: .95rem; letter-spacing: .06em; color: var(--muted); }
.marquee__track i { color: var(--cyan); font-style: normal; font-size: .7rem; }
@keyframes marquee { to { transform: translateX(-50%); } }

.scroll-hint { position: absolute; left: var(--pad-x); bottom: 5.2rem; z-index: 3; display: flex; align-items: center; gap: .8rem; font-family: var(--font-mono); font-size: .66rem; letter-spacing: .3em; color: var(--faint); }
.scroll-hint__line { width: 46px; height: 1px; background: var(--hairline-2); position: relative; overflow: hidden; }
.scroll-hint__line::after { content: ""; position: absolute; inset: 0; width: 40%; background: var(--cyan); animation: slide 2.4s var(--ease) infinite; }
@keyframes slide { 0% { transform: translateX(-100%); } 60%,100% { transform: translateX(260%); } }

/* ============ 按钮 ============ */
.btn { display: inline-flex; align-items: center; justify-content: center; font-family: var(--font-sans); font-weight: 500; font-size: .98rem; padding: .85rem 1.8rem; border-radius: 999px; border: 1px solid transparent; position: relative; overflow: hidden; transition: transform var(--t-fast) var(--ease); isolation: isolate; }
.btn span { position: relative; z-index: 1; }
.btn--solid { background: var(--fg); color: var(--bg); }
.btn--solid::before { content:""; position:absolute; inset:0; background: var(--cyan); transform: translateY(101%); transition: transform var(--t-fast) var(--ease); z-index: -1; }
.btn--solid:hover::before { transform: translateY(0); }
.btn--solid:hover { color: var(--bg); }
.btn--ghost { border-color: var(--hairline-2); color: var(--fg); }
.btn--ghost::before { content:""; position:absolute; inset:0; background: rgba(242,241,236,.1); transform: translateY(101%); transition: transform var(--t-fast) var(--ease); z-index: -1; }
.btn--ghost:hover::before { transform: translateY(0); }
.btn--block { width: 100%; }

/* ============ 业务网格 ============ */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--hairline); border-left: 1px solid var(--hairline); }
.svc { border-right: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); padding: clamp(1.5rem, 3vw, 2.4rem); position: relative; overflow: hidden; transition: background var(--t-mid) var(--ease); }
.svc::before { content: ""; position: absolute; left: 0; top: 0; width: 100%; height: 2px; background: linear-gradient(90deg, var(--blue-2), var(--cyan)); transform: scaleX(0); transform-origin: left; transition: transform var(--t-mid) var(--ease); }
.svc::after { content: ""; position: absolute; right: -30%; bottom: -30%; width: 70%; height: 70%; background: radial-gradient(circle, rgba(0,194,255,.12), transparent 65%); opacity: 0; transition: opacity var(--t-mid) var(--ease); }
.svc:hover { background: rgba(242,241,236,.03); }
.svc:hover::before { transform: scaleX(1); }
.svc:hover::after { opacity: 1; }
.svc__no { font-family: var(--font-mono); font-size: .72rem; color: var(--faint); letter-spacing: .2em; }
.svc__name { font-size: clamp(1.15rem, 2vw, 1.5rem); font-weight: 700; margin: 1rem 0 .7rem; transition: color var(--t-mid) var(--ease); }
.svc:hover .svc__name { color: var(--cyan); }
.svc__desc { color: var(--muted); font-size: .95rem; max-width: 26ch; }
.svc__arrow { position: absolute; right: 1.4rem; bottom: 1.2rem; color: var(--cyan); opacity: 0; transform: translateX(-8px); transition: opacity var(--t-mid) var(--ease), transform var(--t-mid) var(--ease); }
.svc:hover .svc__arrow { opacity: 1; transform: none; }
@media (max-width: 900px) { .svc-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .svc-grid { grid-template-columns: 1fr; } }

/* ============ 案例 ============ */
.works { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.work { border: 1px solid var(--hairline); border-radius: 14px; overflow: hidden; background: var(--bg); transition: opacity var(--t-slow) var(--ease), transform var(--t-slow) var(--ease), border-color var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease); will-change: transform; }
.work.tilt-live { transition: border-color var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease); }
.work:hover { border-color: var(--hairline-2); box-shadow: 0 24px 60px -20px rgba(0,0,0,.6); }
.work__visual { aspect-ratio: 16 / 9; position: relative; overflow: hidden; }
/* 案例图片轮播（网格矩阵爆开）：.work__grid 切成 5×4 格，切换时从中心向外逐格翻出露出新图 */
.work__carousel { display: block; }
.work__grid { position: absolute; inset: 0; display: grid; grid-template-columns: repeat(5, 1fr); grid-template-rows: repeat(4, 1fr); perspective: 800px; }
.work__cell { background-repeat: no-repeat; background-size: 500% 400%; width: calc(100% + 2px); height: calc(100% + 2px); margin: -1px; transition: transform .95s cubic-bezier(.4,0,.2,1), opacity .9s ease; will-change: transform, opacity; backface-visibility: hidden; transform-origin: center center; }
.work__cell.is-out { transform: rotateY(180deg) scale(.2); opacity: 0; }
.work__shine { position: absolute; top: 0; left: -80%; width: 60%; height: 100%; background: linear-gradient(105deg, transparent, rgba(255,255,255,.18), transparent); transform: skewX(-20deg); transition: left .8s var(--ease); pointer-events: none; z-index: 5; }
.work:hover .work__shine { left: 120%; }
.work__meta { padding: 1.3rem 1.4rem 1.6rem; }
.work__row { display: flex; justify-content: space-between; align-items: baseline; }
.work__tag { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .16em; color: var(--cyan); }
.work__year { font-family: var(--font-mono); font-size: .68rem; color: var(--faint); }
.work__name { font-size: 1.1rem; font-weight: 700; margin: .6rem 0 .5rem; }
.work__result { color: var(--muted); font-size: .9rem; }
.work__role { display: inline-block; margin-top: .9rem; font-family: var(--font-mono); font-size: .66rem; letter-spacing: .08em; color: var(--faint); border: 1px solid var(--hairline); padding: .3rem .6rem; border-radius: 999px; }
@media (max-width: 900px) { .works { grid-template-columns: 1fr; } }

/* ============ 关于 ============ */
.about__inner { max-width: 1000px; }
.about__name { font-family: var(--font-sans); font-weight: 800; font-size: clamp(1.7rem, 4.2vw, 3rem); line-height: 1.18; letter-spacing: -.005em; margin: 1rem 0 3.2rem; background: linear-gradient(120deg, var(--fg), var(--blue-2)); -webkit-background-clip: text; background-clip: text; color: transparent; overflow: hidden; padding-bottom: .4rem; }
.about__cols { display: grid; grid-template-columns: 1.2fr 1fr; gap: clamp(1.6rem, 4vw, 3.5rem); align-items: start; }
.about__lead { color: var(--muted); font-size: clamp(1rem, 1.6vw, 1rem); max-width: 56ch; }
.about__paras .about__lead + .about__lead { margin-top: 1.4rem; }
.about__list { display: flex; flex-direction: column; }
.about__list li { display: flex; align-items: baseline; gap: 1.1rem; padding: .85rem 0; border-bottom: 1px solid var(--hairline); font-size: 1rem; }
.about__list span { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .14em; color: var(--cyan); width: 4.5em; flex-shrink: 0; }
.about__tag { margin-top: 2rem; font-family: var(--font-mono); font-size: .82rem; letter-spacing: .06em; color: var(--cyan); }
@media (max-width: 720px) { .about__cols { grid-template-columns: 1fr; } }

/* ============ 联系 ============ */
.slide--contact { flex-direction: column; justify-content: center; }
.contact__inner { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 6vw, 5rem); align-items: start; width: 100%; }
.contact__title { font-family: var(--font-sans); font-weight: 700; font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1.05; margin: .6rem 0 1rem; overflow: hidden; }
.contact__lead { color: var(--muted); font-size: 1.05rem; max-width: 40ch; }
.contact__info { margin-top: 2rem; display: flex; flex-direction: column; }
.contact__info li { display: flex; align-items: center; gap: 1.2rem; font-size: 1.05rem; border-bottom: 1px solid var(--hairline); padding: .95rem 0; }
.contact__info span { font-family: var(--font-mono); font-size: .7rem; letter-spacing: .16em; color: var(--faint); width: 3em; flex-shrink: 0; }
.contact__status { width: 8px; height: 8px; border-radius: 50%; background: var(--mint); box-shadow: 0 0 8px var(--mint); margin-right: -.4rem; animation: pulse 2s var(--ease) infinite; }

.contact__form { display: flex; flex-direction: column; gap: 1rem; }
.field { position: relative; }
.field input, .field textarea { width: 100%; background: transparent; border: none; border-bottom: 1px solid var(--hairline-2); color: var(--fg); font-family: var(--font-sans); font-size: 1rem; padding: .75rem .2rem .55rem; resize: none; transition: border-color var(--t-fast) var(--ease); }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--cyan); }
.field label { position: absolute; left: .2rem; top: .75rem; color: var(--faint); font-size: 1rem; pointer-events: none; transition: all var(--t-fast) var(--ease); }
.field input:focus + label, .field input:not(:placeholder-shown) + label,
.field textarea:focus + label, .field textarea:not(:placeholder-shown) + label {
  top: -.7rem; font-size: .68rem; letter-spacing: .12em; color: var(--cyan); font-family: var(--font-mono);
}
.form__hint { font-size: .85rem; color: var(--mint); min-height: 1.2em; }

.footer { position: absolute; left: var(--pad-x); right: var(--pad-x); bottom: 1.4rem; display: flex; justify-content: space-between; align-items: flex-end; border-top: 1px solid var(--hairline); padding-top: 1.1rem; font-family: var(--font-mono); font-size: .7rem; letter-spacing: .08em; color: var(--faint); z-index: 3; }
.footer__left { display: flex; flex-direction: row; flex-wrap: wrap; align-items: baseline; gap: .2rem 1.2rem; }
.footer__right { max-width: 48%; text-align: right; line-height: 1.5; }
@media (max-width: 820px) {
  .contact__inner { grid-template-columns: 1fr; }
  .footer { position: static; margin-top: 2.4rem; flex-direction: column; gap: .8rem; align-items: flex-start; }
  .footer__left { flex-direction: column; gap: .35rem; }
  .footer__right { max-width: none; text-align: left; }
}

/* ============ 手机端优化（重点首页） ============ */
@media (max-width: 720px) {
  :root { --pad-x: 1.2rem; }

  /* 导航条始终固定顶部，不随滚动消失（显式保证） */
  .nav { transform: none; }

  .slide { padding: 5.5rem var(--pad-x) 4.5rem; min-height: auto; overflow: hidden; }
  /* 首页保持满屏居中，并加 padding-top 抵消固定导航高度，让内容下移到视觉中心 */
  .slide--hero { min-height: 100svh; padding: 6.5rem var(--pad-x) 4.5rem; align-items: center; overflow: hidden; }

  /* 背景章节号：缩小、更淡、不抢戏 */
  /* 背景章节号：缩小、更淡、不抢戏；right 收进 slide 内，杜绝水平溢出撑宽页面 */
  .slide__num { font-size: clamp(7.5rem, 42vw, 14rem); right: 0; opacity: .8; }

  /* Hero：内容居中 + 铺满画面 */
  .hero__inner { max-width: 100%; text-align: center; }
  .hero__glow { width: 100vmin; height: 100vmin; opacity: .75; }
  .eyebrow { font-size: .66rem; letter-spacing: .13em; margin-bottom: 1.25rem; justify-content: center; }
  .hero__title { font-size: clamp(2.9rem, 17.5vw, 5rem); line-height: 1; }
  .hero__rotator { font-size: 1rem; margin-top: 1.15rem; justify-content: center; }
  .hero__lead { font-size: 1rem; margin: 1.05rem auto 0; max-width: 34ch; }
  .hero__lead br { display: none; }
  .hero__actions { margin-top: 1.7rem; gap: .7rem; justify-content: center; }
  .hero__actions .btn { padding: .8rem 1.5rem; font-size: .92rem; }
  .hero__meta { margin-top: 1.8rem; gap: .8rem 1.4rem; justify-content: center; }
  .hero__meta li { font-size: .62rem; padding-left: .9rem; }
  .hero__marquee { padding: .8rem 0; }
  .marquee__group { gap: 1.6rem; padding-right: 1.6rem; }
  .marquee__track { animation-duration: 18s; }
  .marquee__track span { font-size: .82rem; }
  .scroll-hint { bottom: 4rem; font-size: .6rem; }

  /* 区块标题 */
  .sec-head { margin-bottom: 1.7rem; }
  .sec-head__title { font-size: clamp(1.6rem, 7.2vw, 2.1rem); }
  .sec-head__desc { font-size: .94rem; }

  /* 业务卡：移动端去掉位移箭头，描述放宽 */
  .svc__desc { max-width: none; }
  .svc__arrow { display: none; }

  /* 案例 */

  /* 关于 */
  .about__quote { font-size: clamp(1.35rem, 6.4vw, 2rem); }
  .about__list li { font-size: .95rem; }

  /* 联系 */
  .contact__info li { font-size: .98rem; }
  .footer { font-size: .62rem; gap: .4rem; }
}
@media (max-width: 380px) {
  .hero__title { font-size: clamp(2.3rem, 17vw, 2.9rem); }
  .hero__actions .btn { width: 100%; }
}

/* ============ 降级：reduced-motion ============ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .reveal, [data-split] .char { opacity: 1 !important; transform: none !important; }
  .preloader { display: none !important; }
  .grain, .cursor-dot, .cursor-ring { display: none !important; }
  body { cursor: auto; }
}

/* ============ 数字人对话气泡(.cw-reply)位置覆盖 ============ */
/* 写在宿主侧 + #qmq-companion 前缀 + !important，压过 widget 自带作用域样式，widget 重构建不丢。 */
#qmq-companion .cw-reply.svelte-oshodx { right: 240px !important; bottom: 340px !important; }
@media (max-width: 720px) {
  #qmq-companion .cw-reply.svelte-oshodx { right: 150px !important; bottom: 180px !important; }
  /* 手机端恢复对话气泡右上角关闭叉（widget 默认在手机端 display:none） */
  #qmq-companion .cw-reply-close.svelte-oshodx { display: block !important; }
}