/* ==========================================================================
   Space Vanta · Hero — base（v6）
   路径：public/hero/base/cs/base.css

   颜色角色（每种颜色只做一件事）：
   · 石墨金属  只用于主按钮（CTA）
   · 冷蓝      只用于“状态与切割线”：下划线、断裂线、航线、进度；不做大面填充
   · 白银 / 钢灰 / 冷蓝玻璃  三块业务板的材质（见 stage.css）

   版式：
   · 桌面  左：文案 + 主按钮 + 品类快捷入口；右：层叠悬浮板舞台；下：配送条
   · 平板  上下堆叠
   · 手机  独立设计，不是桌面缩小版：
           标题 → 配送条（横向滑动）→ 卡片组（左右滑动）→ 分页 → 主按钮 → 品类 → 说明
   ========================================================================== */

.sv-hero {
  /* ---- 文字 ---- */
  --sv-hero-ink: #141A26;
  --sv-hero-muted: #4A5468;            /* 次要文字：在底色上对比度 ≥ 7:1 */
  --sv-hero-hair: rgba(20, 26, 38, .12);

  /* ---- 金属 ---- */
  --sv-hero-ice: #FFFFFF;
  --sv-hero-ice-2: #E3E8EF;
  --sv-hero-ice-3: #BAC3D1;
  --sv-hero-steel: #7C8799;
  --sv-hero-steel-deep: #5C677B;
  --sv-hero-graphite: #2B3346;
  --sv-hero-graphite-deep: #1E2535;

  /* ---- 冷蓝（状态色）---- */
  --sv-hero-glacier: #6AA2FF;
  --sv-hero-glacier-mist: #CFE0FF;
  --sv-hero-glacier-ink: #2F66C9;      /* 浅底上的小字（对比度 ≥ 4.5:1） */

  --sv-hero-graphite-grad: linear-gradient(135deg, #3A4358 0%, #1E2535 62%, #2B3346 100%);
  --sv-hero-sheen: linear-gradient(115deg, transparent 36%, rgba(255, 255, 255, .5) 50%, transparent 64%);

  /* ---- 几何 ---- */
  --sv-hero-max: var(--sv-max, 1480px);   /* 与 header 的“岛”同宽 */
  --sv-hero-gutter: clamp(16px, 3vw, 44px);
  --sv-hero-ease: cubic-bezier(.2, .7, .2, 1);
  --sv-hero-font: var(--sv-font, "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif);

  /* 由 section 内联样式覆盖 */
  --sv-hero-paper: #F3F5F8;
  --sv-hero-pt: 32px;
  --sv-hero-pb: 40px;

  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: var(--sv-hero-pt) 0 var(--sv-hero-pb);
  background: var(--sv-hero-paper);
  color: var(--sv-hero-ink);
  font-family: var(--sv-hero-font);
  -webkit-font-smoothing: antialiased;
}

/* 纬度发丝线：横向极淡，向下消退 */
.sv-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: repeating-linear-gradient(to bottom, transparent 0, transparent 119px, rgba(20, 26, 38, .04) 119px, rgba(20, 26, 38, .04) 120px);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 85%);
          mask-image: linear-gradient(to bottom, #000 0%, transparent 85%);
}

.sv-hero [hidden] { display: none !important; }

.sv-hero__inner {
  position: relative;
  max-width: var(--sv-hero-max);
  margin: 0 auto;
  padding: 0 var(--sv-hero-gutter);
  transition: opacity .9s var(--sv-hero-ease);
}

/* 与 intro 模块配合：开场播放期间隐藏首屏内容 */
html.sv-intro-pending .sv-hero__inner { opacity: 0; }

@keyframes sv-hero-rise {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

@keyframes sv-hero-draw {
  from { clip-path: inset(0 100% 0 0); }
  to   { clip-path: inset(0 0 0 0); }
}

/* ---------- 上半区 ---------- */
.sv-hero__top {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(24px, 4vw, 72px);
  align-items: center;
}

.sv-hero__intro {
  position: relative;
  z-index: 2;
  max-width: 600px;
}

.sv-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 20px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--sv-hero-muted);
}

.sv-hero__eyebrow-mark {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  background: var(--sv-hero-glacier);
  clip-path: polygon(0 0, 100% 0, 100% 55%, 45% 100%, 0 100%);
}

.sv-hero__title {
  margin: 0;
  font-size: clamp(34px, 3.9vw, 58px);
  font-weight: 600;
  line-height: 1.06;
  letter-spacing: -.03em;
  color: var(--sv-hero-ink);
  text-wrap: balance;
}

/* 标题下的“裂线”：一道被切开、错位的冷蓝细线（割裂 DNA） */
.sv-hero__title::after {
  content: "";
  display: block;
  width: 132px;
  height: 7px;
  margin-top: 22px;
  background:
    linear-gradient(90deg, var(--sv-hero-glacier), var(--sv-hero-steel)) 0 0 / 58px 1px no-repeat,
    linear-gradient(90deg, var(--sv-hero-steel), transparent) 74px 6px / 58px 1px no-repeat;
}

html:not(.sv-intro-pending) .sv-hero__title::after {
  animation: sv-hero-draw 1.1s var(--sv-hero-ease) .5s both;
}

.sv-hero__lede {
  margin: 22px 0 0;
  max-width: 44ch;
  font-size: 17px;
  line-height: 1.6;
  color: var(--sv-hero-muted);
}

/* ---------- 主按钮行 ---------- */
.sv-hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 26px;
  margin-top: 30px;
}

.sv-hero__cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 16px;
  overflow: hidden;
  padding: 17px 26px 17px 28px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  text-decoration: none;
  color: #FFFFFF;
  background: var(--sv-hero-graphite-grad);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .16), inset 0 -2px 0 var(--sv-hero-glacier);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.sv-hero__cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--sv-hero-sheen);
  transform: translateX(-100%);
  transition: transform .9s var(--sv-hero-ease);
}

.sv-hero__cta:hover::before { transform: translateX(100%); }

.sv-hero__cta-arrow {
  position: relative;
  display: inline-block;
  width: 26px;
  height: 1px;
  background: currentColor;
  transition: width .4s var(--sv-hero-ease);
}

.sv-hero__cta-arrow::after {
  content: "";
  position: absolute;
  right: 0;
  top: -3.5px;
  width: 7px;
  height: 7px;
  border-top: 1px solid currentColor;
  border-right: 1px solid currentColor;
  transform: rotate(45deg);
}

.sv-hero__cta:hover .sv-hero__cta-arrow { width: 40px; }

.sv-hero__link {
  padding: 4px 0 6px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--sv-hero-ink);
  border-bottom: 1px solid var(--sv-hero-glacier);
}

.sv-hero__link:hover { border-bottom-color: var(--sv-hero-ink); }

.sv-hero__note {
  flex: 1 0 100%;
  margin: 0;
  font-size: 12.5px;
  letter-spacing: .02em;
  color: var(--sv-hero-muted);
}

.sv-hero a:focus-visible,
.sv-hero button:focus-visible {
  outline: 2px solid var(--sv-hero-glacier-ink);
  outline-offset: 4px;
}

/* ---------- 品类快捷入口 ---------- */
.sv-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 0;
}

.sv-hero__chips:empty { display: none; }

.sv-hero__chip {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px 9px 12px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
  text-decoration: none;
  color: var(--sv-hero-ink);
  background: linear-gradient(180deg, #FFFFFF 0%, #E3E8EF 100%);
  box-shadow: inset 0 0 0 1px var(--sv-hero-ice-3);
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%);
  transition: transform .35s var(--sv-hero-ease), box-shadow .35s;
}

a.sv-hero__chip:hover {
  transform: translateY(-2px);
  box-shadow: inset 0 0 0 1px var(--sv-hero-glacier), inset 0 -2px 0 var(--sv-hero-glacier);
}

.sv-hero__chip-mark {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  background: var(--sv-hero-glacier);
  clip-path: polygon(0 0, 100% 0, 100% 55%, 45% 100%, 0 100%);
}

/* ---------- 文案入场（intro 结束后依次上浮） ---------- */
html:not(.sv-intro-pending) .sv-hero__intro > * {
  animation: sv-hero-rise .8s var(--sv-hero-ease) both;
}

html:not(.sv-intro-pending) .sv-hero__intro > :nth-child(2) { animation-delay: .08s; }
html:not(.sv-intro-pending) .sv-hero__intro > :nth-child(3) { animation-delay: .16s; }
html:not(.sv-intro-pending) .sv-hero__intro > :nth-child(4) { animation-delay: .24s; }
html:not(.sv-intro-pending) .sv-hero__intro > :nth-child(5) { animation-delay: .32s; }

/* ==========================================================================
   平板：上下堆叠
   ========================================================================== */
@media (max-width: 1023px) {
  .sv-hero__top {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
  }

  .sv-hero__intro { max-width: 640px; }
}

/* ==========================================================================
   手机：独立设计，不是桌面缩小版
   顺序：标题 → 配送条 → 卡片组 → 分页 → 主按钮 + 小字 → 品类 → 说明
   ========================================================================== */
@media (max-width: 767px) {
  .sv-hero {
    padding-top: min(var(--sv-hero-pt), 20px);
    padding-bottom: min(var(--sv-hero-pb), 32px);
  }

  /* top / intro 不生成盒子：让它们的子元素与配送条一起按 order 排列 */
  .sv-hero__inner {
    display: flex;
    flex-direction: column;
  }

  .sv-hero__top,
  .sv-hero__intro { display: contents; }

  .sv-hero__eyebrow {
    order: 1;
    margin-bottom: 10px;
    font-size: 10.5px;
    letter-spacing: .12em;
  }

  .sv-hero__title {
    order: 2;
    font-size: 31px;
    line-height: 1.08;
  }

  .sv-hero__title::after { width: 96px; margin-top: 14px; }

  .sv-hero__ship { order: 3; }

  .sv-hero__visual { order: 4; }

  .sv-hero__actions {
    order: 5;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    margin-top: 18px;
  }

  .sv-hero__actions .sv-hero__cta {
    justify-content: center;
    padding: 18px 20px;
  }

  .sv-hero__link { align-self: center; }

  .sv-hero__note { flex: 0 0 auto; text-align: center; font-size: 12px; }

  /* 品类：整行横向滑动，贴边 */
  .sv-hero__chips {
    order: 6;
    flex-wrap: nowrap;
    margin: 22px calc(-1 * var(--sv-hero-gutter)) 0;
    padding: 0 var(--sv-hero-gutter) 2px;
    overflow-x: auto;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }

  .sv-hero__chips::-webkit-scrollbar { display: none; }

  .sv-hero__chip { flex: 0 0 auto; }

  .sv-hero__lede {
    order: 7;
    margin-top: 22px;
    font-size: 15px;
    line-height: 1.6;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .sv-hero *,
  .sv-hero *::before,
  .sv-hero *::after {
    animation: none !important;
    transition-duration: .01ms !important;
    transition-delay: 0s !important;
  }
}