/* =========================================================
   青云梯 品牌官网样式表
   视觉基调：#FFF9F6 + 草莓/蓝莓/开心果/芒果奶色系
   结构风格：平整色带、圆润冰块、勺形小图标、轻微奶油纹理
   ========================================================= */

:root {
  --bg-cream: #FFF9F6;
  --ice-strawberry: #F1CDDA;
  --ice-blueberry: #D7D4EE;
  --ice-pistachio: #D8E7CB;
  --ice-mango: #F5E1AD;

  /* 浅色平整色带（保留冰淇淋色相且保障正文阅读对比度） */
  --band-hero-top: #FBF1F5;
  --band-hero-bottom: #F1F0FA;
  --band-strawberry: #F8E8EE;
  --band-blueberry: #EEECF8;
  --band-pistachio: #EDF4E7;
  --band-mango: #FBF3DC;
  --band-cream-alt: #FDF6F2;

  --ink-body: #514A51;
  --ink-strong: #342E34;
  --ink-muted: #6C636C;
  --surface-ice: #FFFFFF;
  --surface-ice-tint: rgba(255, 255, 255, 0.88);
  --border-hairline: rgba(81, 74, 81, 0.14);
  --border-medium: rgba(81, 74, 81, 0.24);
  --shadow-ice: 0 10px 26px rgba(81, 74, 81, 0.06), inset 0 1px 0 rgba(255, 255, 255, 0.92);
  --shadow-ice-hover: 0 14px 32px rgba(81, 74, 81, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.96);

  --font-heading: "Gill Sans", "Gill Sans MT", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --radius-ice: 20px;
  --radius-ice-sm: 14px;
  --radius-pill: 999px;
  --container-max: 1200px;
  --gutter: clamp(16px, 3vw, 28px);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: clip;
}

body {
  margin: 0;
  color: var(--ink-body);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  background-color: var(--bg-cream);
  /* 轻微奶油纹理：极低对比度的细微点阵与柔光质感 */
  background-image:
    radial-gradient(rgba(81, 74, 81, 0.035) 1px, transparent 1px),
    radial-gradient(rgba(241, 205, 218, 0.14) 1px, transparent 1px);
  background-size: 26px 26px, 38px 38px;
  background-position: 0 0, 13px 19px;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--ink-strong);
  outline-offset: 3px;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--ink-strong);
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--ink-strong);
  color: var(--bg-cream);
  padding: 10px 16px;
  border-radius: 0 0 12px 0;
  font-size: 0.9rem;
}

.skip-link:focus {
  left: 0;
}

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

/* 勺形小图标与通用徽章 */
.spoon-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  display: inline-block;
  vertical-align: middle;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  justify-self: start;
  width: fit-content;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--ink-strong);
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--border-hairline);
}

/* 平整色带基础类（严禁波浪边） */
.flat-band {
  width: 100%;
  border-bottom: 1px solid var(--border-hairline);
  padding-block: clamp(44px, 6vw, 72px);
  position: relative;
}

.flat-band--cream {
  background-color: rgba(255, 249, 246, 0.92);
}

.flat-band--hero-top {
  background-color: var(--band-hero-top);
  padding-block: clamp(22px, 3.2vw, 38px);
}

.flat-band--hero-bottom {
  background-color: var(--band-hero-bottom);
  padding-block: clamp(26px, 3.8vw, 44px);
}

.flat-band--strawberry {
  background-color: var(--band-strawberry);
}

.flat-band--blueberry {
  background-color: var(--band-blueberry);
}

.flat-band--pistachio {
  background-color: var(--band-pistachio);
}

.flat-band--mango {
  background-color: var(--band-mango);
}

.flat-band--alt {
  background-color: var(--band-cream-alt);
}

/* 圆润冰块基础卡片 */
.ice-block {
  background: var(--surface-ice-tint);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-ice);
  box-shadow: var(--shadow-ice);
}

.ice-block--solid {
  background: var(--surface-ice);
}

/* 按钮体系 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: 14px;
  border: 1px solid var(--ink-strong);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.16s ease, background-color 0.16s ease, box-shadow 0.16s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background-color: var(--ink-strong);
  color: var(--bg-cream);
  box-shadow: 0 6px 16px rgba(52, 46, 52, 0.14);
}

.btn-primary:hover {
  background-color: #241F24;
}

.btn-pastel {
  background-color: var(--ice-strawberry);
  color: var(--ink-strong);
  border-color: var(--border-medium);
}

.btn-pastel:hover {
  background-color: #ECC0D0;
}

.btn-ghost {
  background-color: rgba(255, 255, 255, 0.9);
  color: var(--ink-strong);
  border-color: var(--border-medium);
}

.btn-ghost:hover {
  background-color: #FFFFFF;
}

.btn-sm {
  min-height: 36px;
  padding: 6px 14px;
  font-size: 0.875rem;
  border-radius: 12px;
}

.btn[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

/* =========================================================
   导航栏：左侧品牌、中央栏目、右侧 CTA
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 120;
  background-color: rgba(255, 249, 246, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-hairline);
}

.header-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  min-height: 70px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink-strong);
}

.brand-cube {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--ice-strawberry), var(--ice-blueberry));
  border: 1px solid var(--border-medium);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.85);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-sub {
  font-size: 0.72rem;
  color: var(--ink-muted);
}

.primary-nav {
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  justify-content: center;
  list-style: none;
  gap: clamp(10px, 1.8vw, 24px);
}

.nav-list a {
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-body);
  padding: 6px 10px;
  border-radius: 10px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  background-color: var(--ice-blueberry);
  color: var(--ink-strong);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--surface-ice);
  border: 1px solid var(--border-medium);
  color: var(--ink-strong);
  cursor: pointer;
}

@media (max-width: 959px) {
  .header-inner {
    grid-template-columns: 1fr auto auto;
    gap: 8px;
    min-height: 62px;
  }

  .header-actions {
    order: 2;
  }

  .nav-toggle {
    display: inline-flex;
    order: 3;
    width: 38px;
    height: 38px;
  }

  .primary-nav {
    display: none;
    order: 4;
    grid-column: 1 / -1;
    padding-bottom: 14px;
  }

  .primary-nav.is-open {
    display: block;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
    padding: 12px;
    border-radius: 16px;
    background: var(--surface-ice);
    border: 1px solid var(--border-hairline);
  }

  .nav-list a {
    display: block;
    padding: 10px 12px;
  }
}

@media (max-width: 479px) {
  .brand-cube {
    width: 32px;
    height: 32px;
    border-radius: 9px;
  }

  .brand-name {
    font-size: 1.1rem;
  }

  .brand-sub {
    font-size: 0.68rem;
  }

  .header-cta {
    padding: 6px 11px;
    font-size: 0.8rem;
    min-height: 36px;
    border-radius: 11px;
  }
}

/* =========================================================
   首屏：上下两条不同浅色背景带
   上方：品牌标题与简介
   下方：左侧游戏、右侧紧凑价值说明
   ========================================================= */
.hero-top-layout {
  display: grid;
  gap: 20px;
}

.hero-top-head {
  display: grid;
  gap: 14px;
  max-width: 880px;
}

.hero-title {
  font-size: clamp(1.9rem, 4.1vw, 3.1rem);
  line-height: 1.18;
}

.hero-lead {
  font-size: clamp(1rem, 1.4vw, 1.14rem);
  color: var(--ink-body);
  max-width: 760px;
}

.hero-top-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: 4px;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.hero-badges li {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  font-size: 0.84rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--border-hairline);
}

.hero-bottom-grid {
  display: grid;
  grid-template-columns: minmax(320px, 430px) 1fr;
  gap: clamp(22px, 3.6vw, 42px);
  align-items: start;
}

@media (max-width: 959px) {
  .hero-bottom-grid {
    grid-template-columns: 1fr;
  }
}

/* =========================================================
   冰淇淋 2048 游戏组件
   ========================================================= */
.game-shell {
  padding: clamp(16px, 2.5vw, 22px);
  background: rgba(255, 255, 255, 0.94);
}

.game-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.game-title-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.game-title {
  font-size: 1.25rem;
}

.game-scores {
  display: flex;
  gap: 8px;
}

.score-pill {
  min-width: 78px;
  padding: 6px 12px;
  border-radius: 12px;
  background: var(--bg-cream);
  border: 1px solid var(--border-hairline);
  text-align: center;
}

.score-label {
  display: block;
  font-size: 0.7rem;
  color: var(--ink-muted);
  line-height: 1.2;
}

.score-val {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--ink-strong);
  line-height: 1.3;
}

.game-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.game-controls .btn {
  flex: 1 1 auto;
}

.game-rules-panel {
  margin-bottom: 12px;
  padding: 12px 14px;
  border-radius: 14px;
  background: var(--band-mango);
  border: 1px solid var(--border-hairline);
  font-size: 0.84rem;
  line-height: 1.55;
}

.game-rules-panel ul {
  padding-left: 18px;
  display: grid;
  gap: 4px;
}

.board-stage {
  position: relative;
  width: 100%;
  max-width: 376px;
  margin-inline: auto;
}

.ice-board {
  width: 100%;
  aspect-ratio: 1 / 1;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-template-rows: repeat(4, minmax(0, 1fr));
  gap: 8px;
  padding: 9px;
  border-radius: 18px;
  background: #EFE7E3;
  border: 1px solid var(--border-medium);
  /* 页面滚动只在棋盘触摸操作期间受限 */
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.ice-board.is-invalid {
  animation: boardNudge 0.2s ease;
}

@keyframes boardNudge {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

.ice-cell {
  width: 100%;
  height: 100%;
  border-radius: 12px;
  background: rgba(255, 249, 246, 0.72);
  border: 1px solid rgba(81, 74, 81, 0.08);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-width: 0;
  min-height: 0;
  padding: 4px;
  text-align: center;
  transition: transform 0.12s ease;
}

.ice-cell.has-tile {
  border-color: rgba(81, 74, 81, 0.18);
  box-shadow: 0 3px 8px rgba(81, 74, 81, 0.08), inset 0 1px 0 rgba(255, 255, 255, 0.78);
}

.ice-cell.is-spawned {
  animation: tilePop 0.16s ease-out;
}

.ice-cell.is-merged {
  animation: tileMerge 0.18s ease-out;
}

@keyframes tilePop {
  0% { transform: scale(0.75); opacity: 0.65; }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes tileMerge {
  0% { transform: scale(0.92); }
  50% { transform: scale(1.07); }
  100% { transform: scale(1); }
}

.tile-num {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1rem, 4.1vw, 1.45rem);
  line-height: 1.05;
  color: var(--ink-strong);
}

.tile-flavor {
  font-size: clamp(0.56rem, 1.8vw, 0.68rem);
  color: var(--ink-body);
  margin-top: 2px;
  line-height: 1;
  opacity: 0.88;
}

/* 冰淇淋方块配色 */
.tile-2 { background: #FFFDFB; }
.tile-4 { background: #F9E6ED; }
.tile-8 { background: var(--ice-strawberry); }
.tile-16 { background: #E7E5F6; }
.tile-32 { background: var(--ice-blueberry); }
.tile-64 { background: var(--ice-pistachio); }
.tile-128 { background: #FAEDC7; }
.tile-256 { background: var(--ice-mango); }
.tile-512 { background: linear-gradient(135deg, var(--ice-strawberry), var(--ice-blueberry)); }
.tile-1024 { background: linear-gradient(135deg, var(--ice-pistachio), var(--ice-mango)); }
.tile-2048 {
  background: linear-gradient(135deg, #F1CDDA 0%, #D7D4EE 35%, #D8E7CB 68%, #F5E1AD 100%);
  border-color: var(--ink-strong);
}
.tile-super {
  background: var(--ink-strong);
}
.tile-super .tile-num,
.tile-super .tile-flavor {
  color: var(--bg-cream);
}

.tile-1024 .tile-num,
.tile-2048 .tile-num,
.tile-super .tile-num {
  font-size: clamp(0.88rem, 3.4vw, 1.2rem);
}

.game-overlay {
  position: absolute;
  inset: 0;
  z-index: 5;
  border-radius: 18px;
  background: rgba(255, 249, 246, 0.92);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px;
  gap: 12px;
  border: 1px solid var(--border-medium);
}

.game-overlay[hidden] {
  display: none;
}

.game-overlay-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.game-hint {
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--ink-muted);
  text-align: center;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 右侧紧凑价值说明 */
.hero-value-panel {
  display: grid;
  gap: 16px;
}

.value-heading {
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
}

.value-list {
  list-style: none;
  display: grid;
  gap: 12px;
}

.value-item {
  padding: 16px 18px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
}

.value-dot {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-hairline);
}

.value-dot--strawberry { background: var(--ice-strawberry); }
.value-dot--pistachio { background: var(--ice-pistachio); }
.value-dot--mango { background: var(--ice-mango); }

.value-item h3 {
  font-size: 1.03rem;
  margin-bottom: 4px;
}

.value-item p {
  font-size: 0.92rem;
  color: var(--ink-body);
}

.value-cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 4px;
}

/* =========================================================
   章节通用标题
   ========================================================= */
.section-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 3.6vw, 38px);
  max-width: 760px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 2.8vw, 2.25rem);
}

.section-head p {
  color: var(--ink-body);
  font-size: 1rem;
}

/* =========================================================
   优势：三段全宽大字说明
   ========================================================= */
.advantages-wrapper {
  border-bottom: 1px solid var(--border-hairline);
}

.advantages-intro {
  background: var(--bg-cream);
  padding-block: clamp(32px, 4.5vw, 48px) clamp(20px, 3vw, 28px);
  border-bottom: 1px solid var(--border-hairline);
}

.advantage-band {
  width: 100%;
  padding-block: clamp(34px, 5vw, 56px);
  border-bottom: 1px solid var(--border-hairline);
}

.advantage-band:last-child {
  border-bottom: 0;
}

.advantage-band--one { background: var(--band-strawberry); }
.advantage-band--two { background: var(--band-blueberry); }
.advantage-band--three { background: var(--band-pistachio); }

.advantage-row {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: clamp(14px, 3vw, 36px);
  align-items: start;
}

.advantage-num {
  font-family: var(--font-heading);
  font-size: clamp(2.1rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1;
  color: var(--ink-strong);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.advantage-content h3 {
  font-size: clamp(1.45rem, 3vw, 2.35rem);
  line-height: 1.25;
  margin-bottom: 12px;
}

.advantage-content p {
  font-size: clamp(0.98rem, 1.3vw, 1.08rem);
  max-width: 78ch;
}

@media (max-width: 639px) {
  .advantage-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}

/* =========================================================
   节点地区：横向分组列表
   ========================================================= */
.node-groups-horizontal {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.node-group-card {
  padding: 22px;
  display: grid;
  gap: 14px;
  align-content: start;
}

.node-group-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-hairline);
}

.node-group-head h3 {
  font-size: 1.15rem;
}

.node-tag {
  font-size: 0.76rem;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-hairline);
}

.node-tag--strawberry { background: var(--ice-strawberry); }
.node-tag--blueberry { background: var(--ice-blueberry); }
.node-tag--mango { background: var(--ice-mango); }

.node-chip-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.node-chip-list li {
  padding: 6px 12px;
  border-radius: 12px;
  background: var(--bg-cream);
  border: 1px solid var(--border-hairline);
  font-size: 0.88rem;
  font-weight: 500;
}

.node-note {
  font-size: 0.84rem;
  color: var(--ink-muted);
}

@media (max-width: 959px) {
  .node-groups-horizontal {
    grid-template-columns: 1fr;
  }
}

/* =========================================================
   AI 与流媒体：错位的矩形场景面板
   ========================================================= */
.staggered-scenarios {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 28px;
  align-items: start;
}

.scenario-panel {
  border-radius: 12px;
  padding: clamp(22px, 3vw, 30px);
  border: 1px solid var(--border-medium);
  box-shadow: 0 10px 24px rgba(81, 74, 81, 0.06);
  display: grid;
  gap: 12px;
}

.scenario-panel--blueberry { background: var(--band-blueberry); }
.scenario-panel--mango { background: var(--band-mango); }
.scenario-panel--strawberry { background: var(--band-strawberry); }
.scenario-panel--pistachio { background: var(--band-pistachio); }

.scenario-panel.is-offset {
  margin-top: 34px;
}

.scenario-kicker {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
}

.scenario-panel h3 {
  font-size: 1.3rem;
}

.scenario-points {
  list-style: none;
  display: grid;
  gap: 7px;
  font-size: 0.92rem;
}

.scenario-points li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

@media (max-width: 767px) {
  .staggered-scenarios {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .scenario-panel.is-offset {
    margin-top: 0;
  }
}

/* =========================================================
   五档套餐：两列结构（左侧突出推荐档 + 右侧四档纵向紧凑）
   ========================================================= */
.plans-grid {
  display: grid;
  grid-template-columns: minmax(290px, 1fr) 1.25fr;
  gap: clamp(18px, 3vw, 28px);
  align-items: stretch;
}

.plan-featured {
  padding: clamp(24px, 3.2vw, 34px);
  background: linear-gradient(180deg, #FFFFFF 0%, #FDF2F6 100%);
  border: 1.5px solid var(--ink-strong);
  border-radius: var(--radius-ice);
  box-shadow: var(--shadow-ice);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}

.plan-featured-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: var(--ice-strawberry);
  border: 1px solid var(--border-medium);
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
}

.plan-featured h3 {
  font-size: 1.6rem;
  margin-top: 8px;
}

.plan-price-row {
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--bg-cream);
  border: 1px solid var(--border-hairline);
}

.plan-price-label {
  font-size: 0.8rem;
  color: var(--ink-muted);
}

.plan-price-value {
  font-family: var(--font-heading);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--ink-strong);
}

.plan-spec-list {
  list-style: none;
  display: grid;
  gap: 10px;
  font-size: 0.94rem;
}

.plan-spec-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--border-hairline);
}

.plans-compact-stack {
  display: grid;
  gap: 12px;
}

.plan-compact-card {
  padding: 16px 20px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: center;
  background: var(--surface-ice);
}

.plan-compact-meta h3 {
  font-size: 1.12rem;
  margin-bottom: 4px;
}

.plan-compact-meta p {
  font-size: 0.88rem;
  color: var(--ink-body);
}

.plan-compact-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.plan-chip {
  font-size: 0.78rem;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-cream);
  border: 1px solid var(--border-hairline);
}

.plans-disclaimer {
  margin-top: 18px;
  font-size: 0.86rem;
  color: var(--ink-muted);
}

@media (max-width: 959px) {
  .plans-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 559px) {
  .plan-compact-card {
    grid-template-columns: 1fr;
  }
}

/* =========================================================
   九篇文章：四篇主文章 + 五篇紧凑索引（避免标准 3x3）
   ========================================================= */
.articles-split {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: clamp(20px, 3vw, 32px);
  align-items: start;
}

.articles-primary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.article-primary-card {
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  transition: transform 0.16s ease, box-shadow 0.16s ease;
}

.article-primary-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-ice-hover);
}

.article-intent-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 0.76rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-hairline);
}

.tag-strawberry { background: var(--ice-strawberry); }
.tag-blueberry { background: var(--ice-blueberry); }
.tag-pistachio { background: var(--ice-pistachio); }
.tag-mango { background: var(--ice-mango); }

.article-primary-card h3 {
  font-size: 1.1rem;
  line-height: 1.38;
}

.article-primary-card p {
  font-size: 0.89rem;
  color: var(--ink-body);
}

.article-read-link {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--ink-strong);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-read-link:hover {
  text-decoration: underline;
}

.articles-compact-index {
  padding: 20px;
  background: var(--surface-ice);
}

.compact-index-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--border-hairline);
}

.compact-index-head h3 {
  font-size: 1.12rem;
}

.compact-index-list {
  list-style: none;
  display: grid;
  gap: 12px;
}

.compact-index-item {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--border-hairline);
}

.compact-index-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.compact-num {
  width: 30px;
  height: 30px;
  border-radius: 10px;
  background: var(--band-mango);
  border: 1px solid var(--border-hairline);
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.compact-index-item a {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.96rem;
  text-decoration: none;
  color: var(--ink-strong);
  display: block;
  margin-bottom: 3px;
}

.compact-index-item a:hover {
  text-decoration: underline;
}

.compact-index-item p {
  font-size: 0.83rem;
  color: var(--ink-muted);
}

@media (max-width: 959px) {
  .articles-split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 639px) {
  .articles-primary-grid {
    grid-template-columns: 1fr;
  }
}

/* =========================================================
   评价：清晰独立
   ========================================================= */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.review-card {
  padding: 22px;
  display: grid;
  gap: 12px;
}

.review-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.review-role {
  font-family: var(--font-heading);
  font-weight: 700;
  color: var(--ink-strong);
}

.review-scene {
  font-size: 0.78rem;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: var(--band-pistachio);
  border: 1px solid var(--border-hairline);
}

.review-note {
  margin-top: 16px;
  font-size: 0.85rem;
  color: var(--ink-muted);
}

@media (max-width: 767px) {
  .reviews-grid {
    grid-template-columns: 1fr;
  }
}

/* =========================================================
   FAQ：清晰独立
   ========================================================= */
.faq-list {
  display: grid;
  gap: 12px;
  max-width: 900px;
}

.faq-item {
  background: var(--surface-ice);
  border: 1px solid var(--border-hairline);
  border-radius: var(--radius-ice-sm);
  overflow: hidden;
}

.faq-trigger {
  width: 100%;
  background: transparent;
  border: 0;
  padding: 18px 20px;
  text-align: left;
  font-family: var(--font-heading);
  font-size: 1.04rem;
  font-weight: 600;
  color: var(--ink-strong);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
}

.faq-trigger:hover {
  background: rgba(215, 212, 238, 0.24);
}

.faq-icon {
  font-size: 1.25rem;
  line-height: 1;
  flex-shrink: 0;
  transition: transform 0.16s ease;
}

.faq-trigger[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
}

.faq-panel {
  padding: 0 20px 18px;
  font-size: 0.94rem;
  color: var(--ink-body);
}

.faq-panel[hidden] {
  display: none;
}

/* =========================================================
   内页与独立文章页排版
   ========================================================= */
.page-hero {
  background: var(--band-blueberry);
  border-bottom: 1px solid var(--border-hairline);
  padding-block: clamp(30px, 4.5vw, 52px);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-bottom: 14px;
}

.page-hero h1 {
  font-size: clamp(1.7rem, 3.4vw, 2.55rem);
  max-width: 880px;
}

.page-hero-meta {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.86rem;
  color: var(--ink-muted);
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: clamp(24px, 4vw, 44px);
  padding-block: clamp(32px, 5vw, 56px);
  align-items: start;
}

.prose-card {
  padding: clamp(22px, 3.6vw, 38px);
  background: var(--surface-ice);
}

.prose-card h2 {
  font-size: 1.38rem;
  margin-top: 26px;
  margin-bottom: 10px;
}

.prose-card h2:first-child {
  margin-top: 0;
}

.prose-card h3 {
  font-size: 1.12rem;
  margin-top: 18px;
  margin-bottom: 8px;
}

.prose-card p {
  margin-bottom: 14px;
}

.prose-card ul,
.prose-card ol {
  margin-bottom: 16px;
  padding-left: 22px;
  display: grid;
  gap: 8px;
}

.prose-callout {
  padding: 16px 18px;
  border-radius: 14px;
  background: var(--band-pistachio);
  border: 1px solid var(--border-hairline);
  margin-block: 18px;
}

.prose-table-wrap {
  overflow-x: auto;
  margin-block: 18px;
}

.prose-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--bg-cream);
  border-radius: 12px;
  overflow: hidden;
}

.prose-table th,
.prose-table td {
  padding: 10px 12px;
  border: 1px solid var(--border-hairline);
  text-align: left;
  vertical-align: top;
}

.prose-table th {
  background: var(--band-strawberry);
  font-family: var(--font-heading);
  color: var(--ink-strong);
}

.article-sidebar {
  display: grid;
  gap: 16px;
  position: sticky;
  top: 90px;
}

.sidebar-box {
  padding: 20px;
  background: var(--surface-ice);
  display: grid;
  gap: 12px;
}

.sidebar-links {
  list-style: none;
  display: grid;
  gap: 8px;
  font-size: 0.9rem;
}

.sidebar-links a {
  text-decoration: none;
}

.sidebar-links a:hover {
  text-decoration: underline;
}

@media (max-width: 959px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
  }
}

/* =========================================================
   页脚：完整导航、外链与品牌说明
   ========================================================= */
.site-footer {
  background: #F4ECE8;
  border-top: 1px solid var(--border-hairline);
  padding-block: clamp(36px, 5vw, 56px);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 24px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--border-hairline);
}

.footer-col h3 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.footer-links {
  list-style: none;
  display: grid;
  gap: 8px;
  font-size: 0.9rem;
}

.footer-links a {
  text-decoration: none;
  color: var(--ink-body);
}

.footer-links a:hover {
  color: var(--ink-strong);
  text-decoration: underline;
}

.footer-bottom {
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.84rem;
  color: var(--ink-muted);
}

@media (max-width: 959px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 559px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}