/* ==========================================================================
   泽禧套料排版软件 · 产品页共用样式
   被 /nest/（通用版）与 /studio/（定长逐板版）两个产品页共同引用
   不依赖 Tailwind CDN / 预编译产物
   ========================================================================== */

:root {
  --brand: #165dff;
  --brand-deep: #0f45c4;
  --brand-soft: #eaf1ff;
  --accent: #ff7d00;
  --accent-soft: #fff4e8;
  --ink: #14161a;
  --ink-2: #2b3038;
  --muted: #5c6472;
  --muted-2: #868e9c;
  --line: #e5e6ea;
  --line-soft: #eef0f3;
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --dark: #14171d;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 2px rgba(20, 22, 26, .05), 0 4px 12px rgba(20, 22, 26, .04);
  --shadow-md: 0 2px 6px rgba(20, 22, 26, .06), 0 16px 40px rgba(20, 22, 26, .08);
  --shadow-lg: 0 4px 12px rgba(20, 22, 26, .07), 0 32px 80px rgba(20, 22, 26, .12);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-2);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, video, svg { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  color: var(--ink);
  margin: 0;
  line-height: 1.25;
  letter-spacing: -0.015em;
  font-weight: 750;
}

p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.container {
  width: min(1160px, 100% - 48px);
  margin-inline: auto;
}

.container-narrow { width: min(800px, 100% - 48px); margin-inline: auto; }

/* ---------- 通用排版 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: .8125rem;
  font-weight: 650;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--brand);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
}

.section { padding: 96px 0; }
.section--tight { padding: 72px 0; }
.section--soft { background: var(--bg-soft); }
.section--dark { background: var(--dark); color: #c8ccd4; }
.section--dark h2, .section--dark h3 { color: #fff; }

.section-head { max-width: 720px; margin-bottom: 56px; }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head h2 {
  font-size: clamp(1.6rem, 3.1vw, 2.35rem);
  margin-bottom: 16px;
}
.section-head p { color: var(--muted); font-size: 1.0625rem; }
.section--dark .section-head p { color: #99a0ad; }

.lead { font-size: 1.125rem; color: var(--muted); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 52px;
  padding: 0 28px;
  border-radius: 999px;
  font-size: .9688rem;
  font-weight: 650;
  letter-spacing: .01em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease, border-color .16s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--brand);
  color: #fff;
  box-shadow: 0 8px 24px rgba(22, 93, 255, .26);
}
.btn--primary:hover { background: var(--brand-deep); box-shadow: 0 12px 30px rgba(22, 93, 255, .32); }

.btn--ghost {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
  box-shadow: var(--shadow-sm);
}
.btn--ghost:hover { border-color: #c9ccd4; }

.btn--dark {
  background: var(--ink);
  color: #fff;
}
.btn--dark:hover { background: #000; }

.btn--sm { height: 44px; padding: 0 22px; font-size: .9063rem; }

.btn svg { width: 17px; height: 17px; flex: none; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.nav.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 4px 16px rgba(20, 22, 26, .04);
}
.nav__inner {
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav__brand { display: flex; align-items: center; gap: 10px; }
.nav__logo {
  width: 32px; height: 32px;
  border-radius: 9px;
  background: linear-gradient(140deg, var(--brand), #3d8bff);
  display: grid; place-items: center;
  color: #fff; font-weight: 800; font-size: .8125rem;
  letter-spacing: -.02em;
}
.nav__title { display: block; font-weight: 700; color: var(--ink); font-size: .9688rem; line-height: 1.2; }
.nav__sub { display: block; font-size: .75rem; color: var(--muted-2); line-height: 1.4; }

.nav__links { display: flex; align-items: center; gap: 30px; }
.nav__links a {
  font-size: .9063rem;
  color: var(--muted);
  font-weight: 550;
  transition: color .15s ease;
}
.nav__links a:hover { color: var(--brand); }

.nav__actions { display: flex; align-items: center; gap: 12px; }
.nav__back {
  font-size: .875rem;
  color: var(--muted-2);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.nav__back:hover { color: var(--brand); }

/* ---------- 产品版本切换 ---------- */
.ver-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  background: #f1f3f6;
  border-radius: 999px;
  flex: none;
}
.ver-switch a {
  font-size: .8125rem;
  font-weight: 600;
  color: var(--muted);
  padding: 6px 14px;
  border-radius: 999px;
  white-space: nowrap;
  transition: background .15s ease, color .15s ease;
}
.ver-switch a:hover { color: var(--ink); }
.ver-switch a.is-current {
  background: #fff;
  color: var(--brand);
  box-shadow: 0 1px 4px rgba(20, 22, 26, .1);
}

/* ---------- HERO ---------- */
.hero {
  position: relative;
  padding: 72px 0 84px;
  overflow: hidden;
  background:
    radial-gradient(1000px 480px at 78% -8%, rgba(22, 93, 255, .09), transparent 62%),
    radial-gradient(760px 420px at 8% 4%, rgba(255, 125, 0, .07), transparent 60%),
    #fff;
}
.hero__grid {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  gap: 48px;
  align-items: center;
}
.hero h1 {
  font-size: clamp(1.9rem, 3.7vw, 3rem);
  line-height: 1.2;
  letter-spacing: -.026em;
  font-weight: 800;
  margin-bottom: 22px;
}
.hero h1 .hl {
  color: var(--brand);
  position: relative;
  white-space: nowrap;
}
.hero__desc {
  font-size: 1.0625rem;
  color: var(--muted);
  max-width: 30em;
  margin-bottom: 32px;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 34px; }

.hero__metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 28px 40px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}
.metric__value {
  font-size: 1.5rem;
  font-weight: 780;
  color: var(--ink);
  letter-spacing: -.02em;
  line-height: 1.2;
}
.metric__value span { font-size: .9375rem; font-weight: 600; color: var(--muted); margin-left: 2px; }
.metric__label { font-size: .8125rem; color: var(--muted-2); margin-top: 2px; }

.hero__visual { position: relative; }
.hero__shot {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  background: #fff;
}
.hero__shot img { width: 100%; }

.hero__badge {
  position: absolute;
  left: -22px;
  bottom: -22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 18px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 12px;
}
.hero__badge-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid; place-items: center;
  flex: none;
}
.hero__badge-icon svg { width: 19px; height: 19px; }
.hero__badge b { display: block; font-size: .9375rem; color: var(--ink); line-height: 1.3; }
.hero__badge small { font-size: .75rem; color: var(--muted-2); }

/* ---------- 对比：料带 vs 板 ---------- */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 8px;
}
.compare__col {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 30px 32px;
  background: #fff;
}
.compare__col--muted { background: #fafbfc; }
.compare__col--active {
  border-color: #c3d4ff;
  box-shadow: 0 12px 40px rgba(22, 93, 255, .10);
  background: linear-gradient(180deg, #fbfcff, #fff);
}
.compare__tag {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .06em;
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 16px;
}
.compare__col--muted .compare__tag { background: #eef0f3; color: var(--muted); }
.compare__col--active .compare__tag { background: var(--brand-soft); color: var(--brand); }
.compare h3 { font-size: 1.1875rem; margin-bottom: 10px; }
.compare p { color: var(--muted); font-size: .9688rem; }
.compare__list { margin-top: 18px; display: grid; gap: 9px; }
.compare__list li {
  display: flex;
  gap: 10px;
  font-size: .9375rem;
  color: var(--muted);
}
.compare__list li svg { width: 17px; height: 17px; flex: none; margin-top: 5px; }
.compare__list li.is-good svg { color: var(--brand); }
.compare__list li.is-bad svg { color: #b9bec9; }

/* ---------- 能力卡片 ---------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 28px 32px;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: #d9dbe2;
}
.card__icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand);
  display: grid; place-items: center;
  margin-bottom: 20px;
}
.card__icon svg { width: 22px; height: 22px; }
.card__num {
  font-size: .75rem;
  font-weight: 700;
  color: var(--muted-2);
  letter-spacing: .08em;
  margin-bottom: 6px;
}
.card h3 { font-size: 1.125rem; margin-bottom: 10px; }
.card p { font-size: .9375rem; color: var(--muted); }

/* ---------- 图文分栏 ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.split--reverse .split__media { order: 2; }
.split__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
  background: #fff;
}
.split__body h2 { font-size: clamp(1.5rem, 2.7vw, 2.05rem); margin-bottom: 18px; }
.split__body > p { color: var(--muted); margin-bottom: 26px; }

.feature-list { display: grid; gap: 18px; }
.feature-list li { display: flex; gap: 14px; }
.feature-list .dot {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--brand-soft);
  color: var(--brand);
  display: grid; place-items: center;
  flex: none;
  margin-top: 3px;
}
.feature-list .dot svg { width: 13px; height: 13px; }
.feature-list b { display: block; color: var(--ink); font-size: .9688rem; margin-bottom: 2px; }
.feature-list span { font-size: .9375rem; color: var(--muted); }

/* ---------- 清单明细 ---------- */
.specimen {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-md);
}
.specimen__panel {
  border-right: 1px solid var(--line);
  padding: 26px 24px;
  background: #fafbfc;
}
.specimen__panel h4 {
  font-size: .8125rem;
  letter-spacing: .06em;
  color: var(--muted-2);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.specimen__rows { display: grid; gap: 0; }
.specimen__row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: .875rem;
  padding: 7px 0;
  border-bottom: 1px dashed var(--line-soft);
  color: var(--muted);
}
.specimen__row b { color: var(--ink); font-weight: 600; font-variant-numeric: tabular-nums; }
.specimen__row:last-child { border-bottom: 0; }

/* ---------- 省板机制 ---------- */
.mech {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 40px;
}
.mech__item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 28px;
  background: #fff;
  transition: box-shadow .2s ease, border-color .2s ease;
}
.mech__item:hover { box-shadow: var(--shadow-sm); border-color: #d9dbe2; }
.mech__item h3 { font-size: 1.0625rem; margin-bottom: 8px; }
.mech__item p { font-size: .9375rem; color: var(--muted); }
.mech__step {
  display: inline-block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--accent);
  margin-bottom: 10px;
}
.flow-line {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 34px;
  font-size: .9375rem;
  color: #c8ccd4;
}
.flow-line .chip {
  padding: 7px 15px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .14);
  background: rgba(255, 255, 255, .05);
  font-weight: 550;
}
.flow-line .chip--on { border-color: rgba(255, 125, 0, .5); color: #ffb066; background: rgba(255, 125, 0, .1); }
.flow-line .arw { color: #4b5058; }

/* ---------- 视频 ---------- */
.video-shell {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #0c0e12;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 16 / 9;
}
/* 绝对定位，避免 video 的固有尺寸把 aspect-ratio 容器撑高 */
.video-shell video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #0c0e12;
}

.video-cover {
  position: absolute;
  inset: 0;
  border: 0;
  padding: 0;
  width: 100%;
  cursor: pointer;
  display: block;
  overflow: hidden;
  background: #0b0d11;
}
.video-cover__img { display: block; width: 100%; height: 100%; object-fit: cover; }
.video-cover__play {
  position: absolute;
  left: 76%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 88px; height: 88px;
  border-radius: 50%;
  background: #10141b;
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 12px 40px rgba(10, 16, 28, .38), 0 0 0 8px rgba(16, 20, 27, .07);
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.video-cover:hover .video-cover__play {
  transform: translate(-50%, -50%) scale(1.07);
  background: #165dff;
  box-shadow: 0 14px 46px rgba(22, 93, 255, .42), 0 0 0 10px rgba(22, 93, 255, .1);
}
.video-cover__play svg { width: 26px; height: 26px; margin-left: 4px; }
.video-cover__tag {
  position: absolute;
  right: 18px;
  top: 16px;
  font-size: .8125rem;
  color: #fff;
  background: rgba(12, 16, 22, .72);
  padding: 5px 12px;
  border-radius: 999px;
  letter-spacing: .01em;
}
.video-shell.is-playing .video-cover { display: none; }

/* ---------- 数据 ---------- */
/* ---------- 界面截图墙 ---------- */
.gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.gallery__item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform .25s cubic-bezier(.2, .7, .3, 1), box-shadow .25s ease;
}
.gallery__item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.gallery__item img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; background: #f4f5f7; }
.gallery__item figcaption {
  padding: 13px 16px;
  font-size: .9063rem;
  font-weight: 650;
  color: var(--ink);
  border-top: 1px solid var(--line-soft);
}
.gallery__item--wide { grid-column: 1 / -1; }
.gallery__item--wide .gallery__frame { background: #0c0e12; line-height: 0; }
.gallery__item--wide video { width: 100%; height: auto; background: #000; }

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, .1);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat {
  background: var(--dark);
  padding: 30px 26px 32px;
}
.stat b {
  display: block;
  font-size: clamp(1.75rem, 3vw, 2.4rem);
  font-weight: 780;
  color: #fff;
  letter-spacing: -.03em;
  line-height: 1.1;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}
.stat b i { font-style: normal; font-size: .5em; color: var(--muted-2); font-weight: 600; margin-left: 3px; }
.stat span { font-size: .875rem; color: #99a0ad; }

.case-note {
  margin-top: 28px;
  padding: 22px 26px;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, .1);
  background: rgba(255, 255, 255, .04);
  font-size: .9375rem;
  color: #99a0ad;
}
.case-note b { color: #e8eaee; }

/* 浅色底上的同一组件 */
.case-note--light {
  border-color: var(--line);
  background: #fff;
  color: var(--muted);
}
.case-note--light b { color: var(--ink); font-weight: 650; }

/* ---------- 流程 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  counter-reset: step;
}
.step {
  position: relative;
  padding-top: 26px;
  border-top: 2px solid var(--line);
}
.step::before {
  counter-increment: step;
  content: "0" counter(step);
  position: absolute;
  top: 14px; left: 0;
  font-size: .75rem;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: .08em;
  background: #fff;
  padding-right: 10px;
}
.step { padding-top: 46px; }
.step h3 { font-size: 1.0625rem; margin-bottom: 8px; }
.step p { font-size: .9375rem; color: var(--muted); }

/* ---------- FAQ ---------- */
.faq { border-top: 1px solid var(--line); }
.faq__item { border-bottom: 1px solid var(--line); }
.faq__q {
  width: 100%;
  background: none;
  border: 0;
  padding: 24px 44px 24px 0;
  text-align: left;
  font-family: inherit;
  font-size: 1.0625rem;
  font-weight: 650;
  color: var(--ink);
  cursor: pointer;
  position: relative;
  line-height: 1.5;
}
.faq__q::after {
  content: "";
  position: absolute;
  right: 6px; top: 50%;
  width: 9px; height: 9px;
  border-right: 2px solid var(--muted-2);
  border-bottom: 2px solid var(--muted-2);
  transform: translateY(-70%) rotate(45deg);
  transition: transform .25s ease;
}
.faq__item.is-open .faq__q::after { transform: translateY(-30%) rotate(-135deg); }
.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq__a > div {
  padding: 0 48px 26px 0;
  color: var(--muted);
  font-size: .9688rem;
}
.faq__item.is-open .faq__a { max-height: 400px; }

/* ---------- CTA ---------- */
.cta {
  background: linear-gradient(135deg, #165dff, #0b3bb0);
  border-radius: var(--radius-lg);
  padding: 64px 56px;
  color: #fff;
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 48px;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.cta::after {
  content: "";
  position: absolute;
  right: -120px; top: -120px;
  width: 380px; height: 380px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .07);
}
.cta h2 { color: #fff; font-size: clamp(1.55rem, 3vw, 2.2rem); margin-bottom: 14px; text-wrap: balance; }
.cta p { color: rgba(255, 255, 255, .78); font-size: 1rem; max-width: 34em; }
.cta__actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: flex-end; position: relative; z-index: 1; }
.cta .btn--ghost { background: rgba(255, 255, 255, .14); border-color: rgba(255, 255, 255, .46); color: #fff; }
.cta .btn--ghost:hover { background: rgba(255, 255, 255, .2); }
.cta .btn--dark { background: #fff; color: var(--brand-deep); }
.cta .btn--dark:hover { background: #eef3ff; }

/* ---------- 页脚 ---------- */
.foot {
  border-top: 1px solid var(--line);
  padding: 52px 0 40px;
  font-size: .875rem;
  color: var(--muted-2);
  background: #fff;
}
.foot__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}
.foot h4 { font-size: .875rem; color: var(--ink); margin-bottom: 14px; font-weight: 650; }
.foot ul { display: grid; gap: 9px; }
.foot a:hover { color: var(--brand); }
.foot__bottom {
  border-top: 1px solid var(--line-soft);
  padding-top: 22px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  font-size: .8125rem;
}
.foot__brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.foot__brand .nav__logo { width: 28px; height: 28px; font-size: .6875rem; }
.foot__brand b { color: var(--ink); font-size: .9375rem; }

/* ---------- 移动端 ---------- */
@media (max-width: 1024px) {
  .hero__grid { grid-template-columns: 1fr; gap: 44px; }
  .hero__shot { transform: none; }
  .hero__badge { left: auto; right: 16px; bottom: -18px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 34px; }
  .split--reverse .split__media { order: 0; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 32px 22px; }
  .specimen { grid-template-columns: 1fr; }
  .specimen__panel { border-right: 0; border-bottom: 1px solid var(--line); }
  .cta { grid-template-columns: 1fr; padding: 48px 36px; }
  .cta__actions { justify-content: flex-start; }
  .foot__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .container, .container-narrow { width: calc(100% - 36px); }
  .section { padding: 62px 0; }
  .section--tight { padding: 48px 0; }
  .nav__inner { height: 60px; gap: 12px; }
  .nav__links { display: none; }
  .nav__back { display: none; }
  .nav__actions { gap: 8px; }
  .nav__actions > .btn { display: none; }
  .ver-switch a { padding: 5px 10px; font-size: .75rem; }
  .gallery { grid-template-columns: 1fr; gap: 14px; }
  .nav__sub { display: none; }
  .nav__title { font-size: .875rem; }
  .nav__logo { width: 28px; height: 28px; border-radius: 8px; font-size: .75rem; }
  .hero { padding: 40px 0 52px; }
  .hero__desc { font-size: 1rem; }
  .hero__actions .btn { flex: 1 1 100%; }
  .hero__metrics {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px 16px;
  }
  .metric__value { font-size: 1.25rem; }
  /* 移动端浮动卡片改成静态，避免压住主图 */
  .hero__badge {
    position: static;
    margin: 14px auto 0;
    width: fit-content;
    transform: none;
  }
  .section-head h2 { font-size: 1.4rem; text-wrap: balance; }
  .compare, .cards, .mech { grid-template-columns: 1fr; }
  .gallery { grid-template-columns: 1fr 1fr; }
  .card { padding: 26px 22px; }
  .section-head { margin-bottom: 38px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat { padding: 22px 18px; }
  .steps { grid-template-columns: 1fr; }
  .cta { padding: 38px 24px; border-radius: var(--radius); }
  .cta__actions { width: 100%; }
  .cta__actions .btn { flex: 1 1 100%; }
  .foot__grid { grid-template-columns: 1fr; gap: 28px; }
  .faq__q { font-size: 1rem; padding-right: 34px; }
  .faq__a > div { padding-right: 20px; }
  .video-cover__play { width: 60px; height: 60px; box-shadow: 0 8px 24px rgba(10, 16, 28, .35), 0 0 0 5px rgba(16, 20, 27, .07); }
  .video-cover__play svg { width: 19px; height: 19px; margin-left: 3px; }
  .video-cover__tag { top: 10px; right: 10px; font-size: .6875rem; padding: 4px 9px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
  .hero__shot { transform: none; }
}

/* ---------- 打印 ---------- */
@media print {
  .nav, .video-shell, .cta__actions { display: none; }
  .section { padding: 24px 0; }
}