/* ==========================================================================
   组件层：氛围、液态玻璃卡片、图标、图表、布局模块
   ========================================================================== */

/* ==========================================================================
   1. 氛围层 —— 灰色底 + 强烈橙色渐变光晕 + 磨砂颗粒
   ========================================================================== */

.atmosphere {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* 橙色光晕：三个源，强对比但低饱和 */
.atmosphere::before {
  content: "";
  position: absolute;
  inset: -10%;
  background:
    radial-gradient(46rem 34rem at 8% -6%, rgba(255, 107, 44, 0.30), transparent 62%),
    radial-gradient(38rem 30rem at 96% 16%, rgba(255, 138, 61, 0.16), transparent 64%),
    radial-gradient(52rem 40rem at 50% 104%, rgba(255, 88, 22, 0.13), transparent 60%);
  filter: blur(2px);
}

/* 磨砂颗粒（SVG feTurbulence 内联，不依赖外部资源） */
.atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.045;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* 极细工程网格：让"灰色背景"不是一片死灰 */
.grid-veil {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: radial-gradient(120% 90% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(120% 90% at 50% 0%, #000 20%, transparent 78%);
}

/* 页面主层：压在氛围层之上 */
.page {
  position: relative;
  z-index: 2;
}

/* ==========================================================================
   2. 液态玻璃卡片
   三层构成：折射边框(::before) + 高光扫过(::after) + 卡片实体
   ========================================================================== */

.glass {
  position: relative;
  isolation: isolate;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--hair);
  box-shadow: var(--glass-inner), var(--shadow-2);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  overflow: hidden;
}

/* 折射光边框：上亮下暗的 1px 内描边，模拟玻璃边缘折光 */
.glass::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.26) 0%,
    rgba(255, 255, 255, 0.05) 26%,
    rgba(255, 255, 255, 0) 48%,
    rgba(255, 107, 44, 0.10) 78%,
    rgba(255, 255, 255, 0.12) 100%
  );
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  pointer-events: none;
  z-index: 3;
}

/* 卡片内玻璃折射：左上角一片高光，模拟面板厚度 */
.glass::after {
  content: "";
  position: absolute;
  top: -40%;
  left: -20%;
  width: 80%;
  height: 90%;
  border-radius: 50%;
  background: radial-gradient(
    closest-side,
    rgba(255, 255, 255, 0.085),
    rgba(255, 255, 255, 0.02) 58%,
    transparent 72%
  );
  filter: blur(14px);
  pointer-events: none;
  z-index: 0;
}

.glass > * { position: relative; z-index: 1; }

/* 强调型玻璃：左侧橙色内发光，用于"唯一重点"卡片 */
.glass--hot {
  background:
    linear-gradient(180deg, rgba(255, 107, 44, 0.10), rgba(255, 107, 44, 0.01) 46%),
    var(--glass-bg-deep);
  border-color: rgba(255, 138, 61, 0.24);
  box-shadow:
    var(--glass-inner),
    0 8px 28px rgba(0, 0, 0, 0.44),
    0 0 0 1px rgba(255, 107, 44, 0.10),
    0 18px 60px -24px rgba(255, 107, 44, 0.42);
}

/* 深层玻璃：用于堆叠在后方的卡片 */
.glass--back {
  background: rgba(18, 18, 21, 0.72);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), var(--shadow-1);
}

/* 悬停：抬起 + 边缘增亮（只用 transform / opacity） */
.glass--lift {
  transition:
    transform var(--dur-base) var(--ease-out),
    border-color var(--dur-base) var(--ease-out),
    box-shadow var(--dur-base) var(--ease-out);
  will-change: transform;
}
.glass--lift:hover {
  transform: translateY(-4px);
  border-color: var(--hair-strong);
  box-shadow: var(--glass-inner), var(--shadow-3);
}

/* ==========================================================================
   3. 排版模块
   ========================================================================== */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--accent);
  flex: none;
}
.eyebrow--plain::before { display: none; }

.section-title {
  font-family: var(--font-display);
  font-size: var(--fs-h2);
  font-weight: 600;
  letter-spacing: -0.005em;
  line-height: 1.16;
}
.section-title em {
  font-style: normal;
  color: var(--accent);
}

.lead {
  font-size: var(--fs-lead);
  line-height: 1.85;
  color: var(--text-dim);
  max-width: 40em;
}

.tiny { font-size: var(--fs-mono); color: var(--text-mute); }

/* 中文标题的行内英文副标 */
.tag-en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-mute);
  font-weight: 400;
}

/* ==========================================================================
   4. 页面骨架
   ========================================================================== */

.wrap {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

section.block {
  padding-block: clamp(56px, 8vh, 104px);
  position: relative;
}

/* 区块分隔：发丝线 + 左侧短橙线 */
.rule {
  height: 1px;
  background: linear-gradient(90deg, var(--accent-line), var(--hair) 18%, var(--hair) 100%);
  opacity: 0.65;
}

/* ---- 顶部固定条 ---- */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: 12px var(--gutter);
  background: rgba(12, 12, 14, 0.66);
  border-bottom: 1px solid transparent;
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
  transition: border-color var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out);
}
.topbar.is-scrolled {
  border-bottom-color: var(--hair);
  background: rgba(12, 12, 14, 0.86);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.brand__mark {
  width: 22px; height: 22px;
  color: var(--accent);
  flex: none;
}
.brand__sub {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--text-mute);
  text-transform: uppercase;
  padding-left: 10px;
  border-left: 1px solid var(--hair-strong);
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
}
.nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  font-size: var(--fs-small);
  color: var(--text-dim);
  border-radius: var(--radius-xs);
  transition: color var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out);
}
.nav a:hover { color: var(--text); background: rgba(255, 255, 255, 0.045); }

/* 页内导航：当前区块高亮 */
.nav a[aria-current="true"] {
  color: var(--text);
}
.nav a[aria-current="true"]::after {
  content: "";
  position: absolute;
}

.topbar__cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  font-size: var(--fs-small);
  font-weight: 600;
  color: #170a03;
  background: linear-gradient(180deg, #ff7d43, #f25c1c);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.28) inset,
              0 6px 22px -6px rgba(255, 107, 44, 0.66);
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}
.topbar__cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.34) inset,
              0 10px 28px -6px rgba(255, 107, 44, 0.8);
}
.topbar__cta:active { transform: translateY(0) scale(0.985); }

/* ==========================================================================
   5. 封面（Hero）
   ========================================================================== */

.hero {
  min-height: 100svh;
  display: grid;
  grid-template-rows: 1fr auto;
  padding-top: 92px;
  padding-bottom: 32px;
  position: relative;
  overflow: hidden;
}

.hero__grid {
  align-self: center;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  align-items: center;
  gap: clamp(24px, 4vw, 64px);
  padding-block: clamp(24px, 5vh, 56px);
}

.hero__copy { position: relative; z-index: 2; }

/* 品名：超大展示字，压缩字距 */
.hero__grade {
  font-family: var(--font-display);
  font-size: var(--fs-mega);
  font-weight: 700;
  line-height: 0.86;
  letter-spacing: -0.035em;
  margin-block: 12px 0;
  background: linear-gradient(178deg, #ffffff 8%, #d8d5d0 52%, #9a9791 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  /* 破格：右侧故意超出栅格 */
  margin-right: -0.14em;
}

.hero__cn {
  font-size: clamp(19px, 2.1vw, 26px);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
  margin-top: 10px;
}
.hero__en {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.1em;
  color: var(--text-mute);
  margin-top: 6px;
  text-transform: uppercase;
}

.hero__lead {
  margin-top: 22px;
  max-width: 30em;
  font-size: var(--fs-body);
  line-height: 1.9;
  color: var(--text-dim);
}

/* 封面数据条：四个数，小卡片 */
.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 32px;
  max-width: 640px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: var(--fs-body);
  font-weight: 600;
  transition: transform var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              box-shadow var(--dur-fast) var(--ease-out);
}
.btn--primary {
  color: #170a03;
  background: linear-gradient(180deg, #ff7d43, #f25c1c);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset,
              0 10px 30px -10px rgba(255, 107, 44, 0.9);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.36) inset,
              0 16px 38px -10px rgba(255, 107, 44, 1);
}
.btn--primary:active { transform: translateY(0) scale(0.985); }

.btn--ghost {
  color: var(--text);
  border: 1px solid var(--hair-strong);
  background: rgba(255, 255, 255, 0.03);
}
.btn--ghost:hover {
  transform: translateY(-2px);
  border-color: var(--hair-refract);
  background: rgba(255, 255, 255, 0.06);
}
.btn--ghost:active { transform: translateY(0) scale(0.985); }

.btn__arrow {
  width: 15px; height: 15px;
  transition: transform var(--dur-fast) var(--ease-out);
}
.btn:hover .btn__arrow { transform: translateX(3px); }

/* 封面右侧：钢板叠垛剖面（CSS 3D） */
.hero__visual {
  position: relative;
  justify-self: end;
  width: 100%;
  max-width: 520px;
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
}

/* 视觉区背后的橙色聚焦光 */
.hero__visual::before {
  content: "";
  position: absolute;
  inset: 6%;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 46%, rgba(255, 107, 44, 0.30), transparent 64%);
  filter: blur(28px);
  z-index: 0;
}

/* 底部坐标刻度线，制造"工程图"感 */
.hero__scale {
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 26px;
  z-index: 2;
  opacity: 0.6;
}

/* 封面底部：滚动提示 */
.hero__foot {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--sp-5);
  border-top: 1px solid var(--hair);
  padding-top: 16px;
  color: var(--text-mute);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.hero__scroll {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.hero__scroll span {
  display: block;
  width: 1px; height: 26px;
  background: linear-gradient(180deg, var(--accent), transparent);
}

/* ==========================================================================
   6. 数据卡（小而精，不撑满）
   ========================================================================== */

.stat {
  position: relative;
  padding: 13px 14px 12px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--hair);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: border-color var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out);
}
.stat:hover {
  border-color: rgba(255, 138, 61, 0.30);
  background: rgba(255, 107, 44, 0.06);
}
.stat__label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-mute);
  letter-spacing: 0.04em;
  white-space: nowrap;
}
.stat__label svg { width: 12px; height: 12px; flex: none; color: var(--text-mute); }
.stat__value {
  display: flex;
  align-items: baseline;
  gap: 3px;
  margin-top: 7px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 24px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--text);
}
.stat__unit {
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--text-mute);
}
.stat--hot .stat__value { color: var(--accent); }

/* ==========================================================================
   7. 规格明细表
   ========================================================================== */

.table-shell {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--hair);
  background: rgba(20, 20, 23, 0.55);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.tbl {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  font-variant-numeric: tabular-nums;
}
.tbl caption {
  caption-side: top;
  text-align: left;
  padding: 14px 18px;
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--text-mute);
  border-bottom: 1px solid var(--hair);
}
.tbl thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  text-align: right;
  font-weight: 500;
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-mute);
  padding: 11px 14px;
  background: rgba(24, 24, 28, 0.96);
  border-bottom: 1px solid var(--hair-strong);
  white-space: nowrap;
}
.tbl thead th:first-child,
.tbl tbody td:first-child { text-align: left; padding-left: 20px; }
.tbl tbody td {
  text-align: right;
  padding: 10px 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.045);
  color: var(--text-dim);
}
.tbl tbody tr { transition: background var(--dur-fast) var(--ease-out); }
.tbl tbody tr:hover { background: rgba(255, 107, 44, 0.055); }
.tbl tbody tr:hover td { color: var(--text); }
.tbl tbody tr:last-child td { border-bottom: 0; }

/* 厚度列：用橙色小方块代替数字前置符号 */
.tbl .t-mark {
  display: inline-block;
  width: 4px;
  border-radius: 1px;
  background: var(--accent);
  margin-right: 8px;
  vertical-align: -1px;
}

.tbl__foot td {
  border-top: 1px solid var(--hair-strong);
  font-weight: 500;
  color: var(--text) !important;
  background: rgba(255, 107, 44, 0.05);
}

.tbl-scroll {
  max-height: 460px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

/* ==========================================================================
   8. 图标格（用图形表达数据，不用 emoji）
   ========================================================================== */

.icon-tile {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  align-items: start;
  padding: 15px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--hair);
  transition: border-color var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out);
}
.icon-tile:hover {
  border-color: rgba(255, 138, 61, 0.30);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}
.icon-tile__icon {
  width: 34px; height: 34px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid rgba(255, 138, 61, 0.20);
}
.icon-tile__icon svg { width: 18px; height: 18px; }
.icon-tile__title {
  font-size: var(--fs-small);
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}
.icon-tile__desc {
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-mute);
  margin-top: 3px;
}

/* ==========================================================================
   9. 区块标题行（左标题 + 右说明）
   ========================================================================== */

.block-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.86fr);
  gap: clamp(16px, 4vw, 56px);
  align-items: end;
  margin-bottom: clamp(28px, 4vh, 48px);
}
.block-head__right { padding-bottom: 4px; }

/* ==========================================================================
   10. 浮动联系条（右下，不遮挡内容）
   ========================================================================== */

.dock {
  position: fixed;
  right: clamp(14px, 2vw, 28px);
  bottom: clamp(14px, 2vh, 26px);
  z-index: 60;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 5px;
  border-radius: 999px;
  background: rgba(22, 22, 26, 0.76);
  border: 1px solid var(--hair-strong);
  -webkit-backdrop-filter: saturate(180%) blur(24px);
  backdrop-filter: saturate(180%) blur(24px);
  box-shadow: var(--glass-inner), var(--shadow-3);
  transform: translateY(140%);
  opacity: 0;
  transition: transform 520ms var(--ease-out), opacity 320ms var(--ease-out);
}
.dock.is-visible { transform: none; opacity: 1; }
.dock a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 40px;
  padding: 0 16px;
  border-radius: 999px;
  font-size: var(--fs-small);
  font-weight: 500;
  color: var(--text-dim);
  transition: color var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out);
}
.dock a:hover { color: var(--text); background: rgba(255, 255, 255, 0.06); }
.dock a.is-primary {
  color: #170a03;
  background: linear-gradient(180deg, #ff7d43, #f25c1c);
  font-weight: 600;
}
.dock a.is-primary:hover { background: linear-gradient(180deg, #ff8b57, #ff6b2c); }

/* ==========================================================================
   11. 响应式
   ========================================================================== */

@media (max-width: 1080px) {
  .hero__grid { grid-template-columns: 1fr; gap: 8px; }
  .hero__visual {
    justify-self: start;
    max-width: 420px;
    aspect-ratio: 1.25 / 1;
    margin-top: -20px;
  }
  .hero { min-height: auto; padding-top: 108px; }
  .hero__grade { margin-right: 0; }
}

@media (max-width: 860px) {
  .nav { display: none; }
  .block-head { grid-template-columns: 1fr; align-items: start; gap: 14px; }
  .hero__stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero__visual { max-width: 340px; }
  .dock a span { display: none; }
  .dock a { padding: 0 14px; }
}

@media (max-width: 560px) {
  .hero__grade { font-size: clamp(56px, 17vw, 88px); }
  .stat__value { font-size: 21px; }
  .topbar__cta span { display: none; }
  .topbar__cta { padding: 0 14px; }
  .hero__foot { font-size: 9px; letter-spacing: 0.1em; }
}