/* ==========================================================================
   Space Vanta · Hero — base（v3）
   路径：public/hero/base/cs/base.css
   负责：设计令牌 / 容器 / 定位文案 / 主 CTA / 市场区（默认一条 + 更换） / 信任条 /
         页头遮挡 / 与 intro 的衔接 / 手机端排版 / 减少动效

   视觉方向：
   · 底色：冷调暖白，不用纯白，也不用深色大面
   · 金属：白 → 银灰 → 钢灰的多段渐变，只用于切面与卡片表面
   · 冷蓝：#4F8FF7 作为唯一强调色，用于切线、选中态和主按钮
   · 文字：墨色 #151A26 为主，次要文字 #4A5468；主按钮用冷蓝底 + 墨色字
   ========================================================================== */

.sv-hero {
  /* ---- palette ---- */
  --sv-hero-ink: #151A26;
  --sv-hero-muted: #4A5468;
  --sv-hero-hair: rgba(21, 26, 38, .12);

  --sv-hero-m0: #FFFFFF;
  --sv-hero-m1: #E4E9F1;
  --sv-hero-m2: #C4CCDA;
  --sv-hero-m3: #8793A8;
  --sv-hero-m4: #4A5468;

  --sv-hero-blue: #4F8FF7;
  --sv-hero-blue-hi: #A9CCFF;
  --sv-hero-blue-ink: #2C5FBF;

  --sv-hero-metal: linear-gradient(135deg, #FFFFFF 0%, #E4E9F1 26%, #C4CCDA 52%, #8793A8 78%, #D5DCE8 100%);
  --sv-hero-rim: linear-gradient(90deg, rgba(79, 143, 247, 0) 0%, #4F8FF7 55%, #A9CCFF 100%);
  --sv-hero-sheen: linear-gradient(115deg, transparent 36%, rgba(255, 255, 255, .75) 50%, transparent 64%);

  /* ---- geometry ---- */
  --sv-hero-gutter: clamp(16px, 4vw, 56px);
  --sv-hero-max: 1280px;
  --sv-hero-ease: cubic-bezier(.2, .7, .2, 1);
  --sv-hero-font: inherit;

  /* 由 section 内联样式覆盖 */
  --sv-hero-paper: #F3F5F8;
  --sv-hero-pt: 40px;
  --sv-hero-pb: 40px;
  --sv-hero-header-offset-d: 0px;
  --sv-hero-header-offset-m: 64px;

  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--sv-hero-pt) + var(--sv-hero-header-offset-d)) 0 var(--sv-hero-pb);
  background: var(--sv-hero-paper);
  color: var(--sv-hero-ink);
  -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(21, 26, 38, .04) 119px, rgba(21, 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);
}

/* intro 播放期间：隐藏整个首屏内容 */
html.sv-intro-pending .sv-hero__inner { opacity: 0; }

/* ---------- 上半区 ---------- */
.sv-hero__top {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
}

.sv-hero__intro {
  position: relative;
  z-index: 1;
  max-width: 640px;
}

.sv-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 22px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--sv-hero-muted);
}

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

.sv-hero__eyebrow::after {
  content: "";
  width: 56px;
  height: 1px;
  background: linear-gradient(90deg, var(--sv-hero-blue), var(--sv-hero-m3) 70%, transparent);
}

.sv-hero__title {
  margin: 0;
  font-family: var(--sv-hero-font);
  font-size: clamp(36px, 4.6vw, 62px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -.025em;
  color: var(--sv-hero-ink);
  text-wrap: balance;
}

.sv-hero__lede {
  margin: 22px 0 0;
  max-width: 46ch;
  font-size: 17px;
  line-height: 1.6;
  color: var(--sv-hero-muted);
}

/* ---------- 主 CTA ---------- */
.sv-hero__cta {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
  overflow: hidden;
  padding: 15px 26px 15px 28px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--sv-hero-ink);
  background: var(--sv-hero-blue);
  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 .8s 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 a:focus-visible,
.sv-hero button:focus-visible {
  outline: 2px solid var(--sv-hero-blue);
  outline-offset: 4px;
}

/* ---------- 底部：市场 ｜ 信任信号 ---------- */
.sv-hero__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px 32px;
  margin-top: clamp(28px, 3vw, 36px);
  padding-top: 20px;
  border-top: 1px solid var(--sv-hero-hair);
  animation: sv-hero-fade 1s var(--sv-hero-ease) .3s both;
}

/* 市场区：默认只有一行（当前市场），右侧“更换”按钮展开选择器 */
.sv-hero__market {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1 1 360px;
  min-width: 0;
}

.sv-hero__market-label {
  margin: 0;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--sv-hero-muted);
}

.sv-hero__market-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
}

.sv-hero__eta-wrap {
  min-width: 0;
  font-size: 14px;
}

.sv-hero__eta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
  margin: 0;
}

.sv-hero__eta-code {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 22px;
  padding: 0 7px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--sv-hero-ink);
  background: var(--sv-hero-metal);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.sv-hero__eta-value { font-weight: 600; }

.sv-hero__eta-free { color: var(--sv-hero-muted); }

/* 更换按钮：文字 + 细线下划线 + 小箭头（展开时翻转） */
.sv-hero__change {
  appearance: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 4px 0 6px;
  border: 0;
  border-bottom: 1px solid var(--sv-hero-blue);
  background: none;
  color: var(--sv-hero-ink);
  font: inherit;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  cursor: pointer;
}

.sv-hero__change-icon {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform .35s var(--sv-hero-ease);
}

.sv-hero__change[aria-expanded="true"] .sv-hero__change-icon {
  transform: rotate(-135deg) translate(-1px, -1px);
}

/* 展开的选择器：一行小按钮，选中为冷蓝底 */
.sv-hero__picker {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  animation: sv-hero-fade .35s var(--sv-hero-ease) both;
}

.sv-hero__pick {
  appearance: none;
  min-width: 44px;
  padding: 6px 10px;
  border: 1px solid var(--sv-hero-hair);
  background: rgba(255, 255, 255, .72);
  color: var(--sv-hero-ink);
  font: inherit;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .12em;
  cursor: pointer;
  transition: background .3s, border-color .3s;
}

.sv-hero__pick:hover { border-color: rgba(79, 143, 247, .6); }

.sv-hero__pick[aria-pressed="true"] {
  background: var(--sv-hero-blue);
  border-color: transparent;
}

.sv-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--sv-hero-muted);
}

.sv-hero__facts li::before {
  content: "";
  display: inline-block;
  width: 14px;
  height: 1px;
  margin-right: 10px;
  vertical-align: middle;
  background: linear-gradient(90deg, var(--sv-hero-blue), var(--sv-hero-m3));
}

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

@keyframes sv-hero-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* 文案在 intro 结束后才依次上浮 */
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; }

/* ---------- 手机 ---------- */
@media (max-width: 767px) {
  .sv-hero {
    padding-top: calc(min(var(--sv-hero-pt), 32px) + var(--sv-hero-header-offset-m));
    padding-bottom: min(var(--sv-hero-pb), 40px);
  }

  /* 手机顺序：标题 → 视觉 → 副标题 → 按钮 */
  .sv-hero__top {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .sv-hero__intro { display: contents; }

  .sv-hero__eyebrow { order: 1; margin-bottom: 14px; font-size: 10.5px; letter-spacing: .16em; }
  .sv-hero__eyebrow::after { width: 32px; }
  .sv-hero__title { order: 2; font-size: 34px; line-height: 1.1; }
  .sv-hero__visual { order: 3; margin-top: 22px; }
  .sv-hero__lede { order: 4; margin-top: 18px; font-size: 15.5px; line-height: 1.6; }
  .sv-hero__cta { order: 5; width: 100%; justify-content: center; margin-top: 22px; }

  .sv-hero__foot { margin-top: 28px; }
  .sv-hero__market { flex-basis: 100%; }
  .sv-hero__facts { gap: 8px 18px; font-size: 12.5px; }
}

/* ---------- 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;
  }
}