/* ==========================================================================
   养老有保 · 养老保险指南
   全局样式
   ========================================================================== */

:root {
  --ink: #14251f;
  --ink-soft: #4a5c54;
  --ink-mute: #7b8a83;
  --teal: #0f5a4a;
  --teal-deep: #0a3d33;
  --teal-mist: #e7f0ec;
  --amber: #c08a34;
  --amber-deep: #9a6a1e;
  --amber-mist: #f6ead2;
  --cream: #faf7f1;
  --cream-deep: #f2ece1;
  --white: #ffffff;
  --line: #e5dfd3;
  --line-soft: #efe9de;
  --radius-lg: 24px;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 8px rgba(20, 37, 31, 0.05);
  --shadow: 0 14px 40px rgba(20, 37, 31, 0.08);
  --shadow-lg: 0 30px 70px rgba(20, 37, 31, 0.13);
  --serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --wrap: 1180px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

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

a {
  color: var(--teal);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}

a:hover {
  color: var(--amber-deep);
}

h1,
h2,
h3,
h4 {
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.32;
  letter-spacing: 0.01em;
  margin: 0;
  color: var(--ink);
}

p {
  margin: 0;
}

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

::selection {
  background: var(--amber-mist);
  color: var(--teal-deep);
}

.wrap {
  width: min(var(--wrap), calc(100% - 48px));
  margin-inline: auto;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 247, 241, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease),
    background 0.3s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(250, 247, 241, 0.96);
  border-bottom-color: var(--line);
  box-shadow: 0 6px 24px rgba(20, 37, 31, 0.05);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
}

.brand:hover {
  color: var(--ink);
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--teal);
  color: #f6efe1;
  font-family: var(--serif);
  font-size: 20px;
  letter-spacing: 0;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: 0.06em;
}

.brand-text small {
  font-size: 9px;
  letter-spacing: 0.16em;
  color: var(--ink-mute);
  margin-top: 4px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav a {
  position: relative;
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 14.5px;
  color: var(--ink-soft);
  white-space: nowrap;
}

.nav a:hover {
  color: var(--teal);
  background: rgba(15, 90, 74, 0.06);
}

.nav a.is-active {
  color: var(--teal);
  font-weight: 600;
}

.nav a.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--amber);
  transform: translateX(-50%);
}

.nav .nav-cta {
  margin-left: 8px;
  background: var(--teal);
  color: #fff;
  padding: 10px 20px;
}

.nav .nav-cta:hover {
  background: var(--teal-deep);
  color: #fff;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  cursor: pointer;
  padding: 0;
  place-items: center;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  margin: 4px auto;
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* ---------- 通用区块 ---------- */
.section {
  padding: 96px 0;
}

.section--tight {
  padding: 72px 0;
}

.section--cream {
  background: var(--cream-deep);
}

.section--teal {
  background: var(--teal-deep);
  color: #e9f2ee;
}

.section-head {
  max-width: 840px;
  margin-bottom: 48px;
}

.section-head--center {
  margin-inline: auto;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12.5px;
  letter-spacing: 0.18em;
  color: var(--amber-deep);
  text-transform: uppercase;
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--amber);
}

.section-head--center .eyebrow::after {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--amber);
}

.section-head h2 {
  font-size: clamp(26px, 2.9vw, 36px);
  margin-bottom: 16px;
}

.section-head p {
  color: var(--ink-soft);
  font-size: 16.5px;
}

.section--teal .section-head h2,
.section--teal h3 {
  color: #fff;
}

.section--teal .section-head p {
  color: rgba(233, 242, 238, 0.75);
}

.section--teal .eyebrow {
  color: #e3bd7c;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease),
    color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

.btn:hover {
  transform: translateY(-2px);
}

.btn--primary {
  background: var(--teal);
  color: #fff;
  box-shadow: 0 12px 26px rgba(15, 90, 74, 0.24);
}

.btn--primary:hover {
  background: var(--teal-deep);
  color: #fff;
}

.btn--ghost {
  border-color: rgba(20, 37, 31, 0.18);
  color: var(--ink);
  background: transparent;
}

.btn--ghost:hover {
  border-color: var(--teal);
  color: var(--teal);
  background: rgba(15, 90, 74, 0.05);
}

.btn--light {
  background: #fff;
  color: var(--teal-deep);
}

.btn--light:hover {
  color: var(--teal-deep);
  background: var(--amber-mist);
}

.btn .arrow {
  transition: transform 0.25s var(--ease);
}

.btn:hover .arrow {
  transform: translateX(4px);
}

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: 64px 0 88px;
  background: radial-gradient(
      1200px 600px at 88% -10%,
      rgba(192, 138, 52, 0.13),
      transparent 60%
    ),
    radial-gradient(900px 520px at 0% 100%, rgba(15, 90, 74, 0.07), transparent 62%),
    var(--cream);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line), transparent);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  gap: 64px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(36px, 4.5vw, 58px);
  line-height: 1.22;
  margin-bottom: 24px;
}

.hero h1 em {
  font-style: normal;
  color: var(--teal);
  position: relative;
  z-index: 0;
  white-space: nowrap;
}

.hero h1 em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 6px;
  height: 12px;
  background: var(--amber-mist);
  z-index: -1;
  border-radius: 3px;
}

.hero-lead {
  font-size: 17.5px;
  color: var(--ink-soft);
  max-width: 520px;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 40px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  font-size: 13.5px;
  color: var(--ink-mute);
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-meta i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
  font-style: normal;
}

.hero-visual {
  position: relative;
}

.hero-figure {
  position: relative;
  border-radius: 200px 200px 28px 28px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 4.5;
}

.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(10, 61, 51, 0.35));
}

.hero-badge {
  position: absolute;
  left: -24px;
  bottom: -34px;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-radius: var(--radius);
  padding: 18px 22px;
  box-shadow: var(--shadow);
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: 280px;
}

.hero-badge .num {
  flex: 0 0 auto;
  font-family: var(--serif);
  font-size: 34px;
  line-height: 1;
  color: var(--teal);
  white-space: nowrap;
}

.hero-badge .num small {
  font-size: 14px;
  margin-left: 2px;
  white-space: nowrap;
}

.hero-badge p {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--ink-soft);
}

.hero-badge strong {
  display: block;
  font-size: 13.5px;
  color: var(--ink);
  margin-bottom: 2px;
}

.hero-seal {
  position: absolute;
  top: 22px;
  right: -14px;
  width: 92px;
  height: 92px;
  border-radius: 50%;
  background: var(--amber);
  color: #2d1f08;
  display: grid;
  place-items: center;
  text-align: center;
  font-family: var(--serif);
  font-size: 13px;
  line-height: 1.35;
  letter-spacing: 0.08em;
  box-shadow: 0 12px 28px rgba(154, 106, 30, 0.35);
  transform: rotate(8deg);
}

/* ---------- 指标条 ---------- */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin-top: -40px;
  position: relative;
  z-index: 2;
}

.metric {
  padding: 30px 32px;
  border-right: 1px solid var(--line-soft);
}

.metric:last-child {
  border-right: 0;
}

.metric b {
  display: block;
  font-family: var(--serif);
  font-size: clamp(26px, 2.6vw, 34px);
  font-weight: 600;
  color: var(--teal);
  line-height: 1.1;
  margin-bottom: 8px;
}

.metric b span {
  font-size: 15px;
  margin-left: 3px;
  color: var(--amber-deep);
}

.metric p {
  font-size: 13px;
  color: var(--ink-mute);
  line-height: 1.6;
}

/* ---------- 卡片网格 ---------- */
.grid {
  display: grid;
  gap: 24px;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.pillar {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 34px 30px 30px;
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease);
}

.pillar:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(15, 90, 74, 0.25);
}

.pillar .ord {
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--amber-deep);
}

.pillar h3 {
  font-size: 21px;
  margin: 14px 0 12px;
}

.pillar p {
  font-size: 14.5px;
  color: var(--ink-soft);
}

.pillar .tagline {
  display: inline-block;
  margin-top: 20px;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--teal-mist);
  color: var(--teal);
  font-size: 12px;
  letter-spacing: 0.04em;
}

.pillar .icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: var(--amber-mist);
  display: grid;
  place-items: center;
  color: var(--amber-deep);
  margin-bottom: 20px;
}

.pillar .icon svg {
  width: 22px;
  height: 22px;
}

/* ---------- 为什么要买 ---------- */
.reason-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.reason {
  display: grid;
  grid-template-columns: 88px 1fr 320px;
  gap: 28px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.reason .idx {
  font-family: var(--serif);
  font-size: 30px;
  color: var(--amber);
  line-height: 1;
  padding-top: 4px;
}

.reason h3 {
  font-size: 21px;
  margin-bottom: 10px;
}

.reason p {
  color: var(--ink-soft);
  font-size: 15px;
  max-width: 640px;
}

.reason .figure {
  font-family: var(--serif);
  font-size: 40px;
  color: var(--teal);
  line-height: 1.1;
}

.reason .figure small {
  display: block;
  font-family: var(--sans);
  font-size: 12.5px;
  color: var(--ink-mute);
  margin-top: 8px;
  letter-spacing: 0.02em;
}

/* ---------- 问题卡片 ---------- */
.problem {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.problem:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}

.problem .pill {
  align-self: flex-start;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--cream-deep);
  color: var(--amber-deep);
}

.problem h3 {
  font-size: 18.5px;
}

.problem p {
  font-size: 14px;
  color: var(--ink-soft);
}

.problem .solve {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--teal);
  display: flex;
  gap: 8px;
}

.problem .solve::before {
  content: "→";
  color: var(--amber);
}

/* ---------- 测算器 ---------- */
.calc {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.04);
}

.calc-form {
  padding: 40px 38px;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
}

.calc-form h3 {
  font-size: 22px;
  margin-bottom: 6px;
}

.calc-form > p {
  font-size: 13.5px;
  color: rgba(233, 242, 238, 0.65);
  margin-bottom: 26px;
}

.field {
  margin-bottom: 20px;
}

.field label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 13px;
  color: rgba(233, 242, 238, 0.78);
  margin-bottom: 8px;
}

.field label output {
  font-family: var(--serif);
  font-size: 16px;
  color: #f0d5a4;
}

.field input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.18);
  outline: none;
}

.field input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #f0d5a4;
  cursor: pointer;
  border: 3px solid var(--teal-deep);
  box-shadow: 0 0 0 1px #f0d5a4;
}

.field input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #f0d5a4;
  cursor: pointer;
  border: 3px solid var(--teal-deep);
}

.calc-result {
  padding: 40px 38px;
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.calc-result .label {
  font-size: 13px;
  color: rgba(233, 242, 238, 0.7);
  letter-spacing: 0.04em;
}

.calc-result .big {
  font-family: var(--serif);
  font-size: clamp(38px, 4.4vw, 54px);
  color: #f0d5a4;
  line-height: 1.1;
  margin: 10px 0 4px;
}

.calc-result .big span {
  font-size: 18px;
  margin-left: 4px;
  color: rgba(240, 213, 164, 0.8);
}

.calc-result .sub {
  font-size: 14px;
  color: rgba(233, 242, 238, 0.78);
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  margin-bottom: 22px;
}

.calc-rows {
  display: grid;
  gap: 12px;
}

.calc-row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 13.5px;
}

.calc-row span {
  color: rgba(233, 242, 238, 0.62);
}

.calc-row b {
  color: #fff;
  font-weight: 600;
}

.calc-note {
  margin-top: 22px;
  font-size: 12px;
  line-height: 1.7;
  color: rgba(233, 242, 238, 0.45);
}

/* ---------- 文章卡片 ---------- */
.post-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.post-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.post-card .thumb {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--cream-deep);
}

.post-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s var(--ease);
}

.post-card:hover .thumb img {
  transform: scale(1.05);
}

.post-card .body {
  padding: 24px 24px 26px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.post-card .meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--ink-mute);
}

.post-card .meta .cat {
  color: var(--amber-deep);
  background: var(--amber-mist);
  border-radius: 999px;
  padding: 3px 10px;
}

.post-card h3 {
  font-size: 18.5px;
  line-height: 1.5;
}

.post-card p {
  font-size: 13.8px;
  color: var(--ink-soft);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card .more {
  margin-top: auto;
  padding-top: 14px;
  font-size: 13px;
  color: var(--teal);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ---------- 内页头 ---------- */
.page-hero {
  padding: 72px 0 64px;
  background: linear-gradient(180deg, var(--cream) 0%, var(--cream-deep) 100%);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  border: 1px solid rgba(192, 138, 52, 0.22);
  right: -120px;
  top: -180px;
}

.page-hero .breadcrumb {
  font-size: 12.5px;
  color: var(--ink-mute);
  margin-bottom: 20px;
  letter-spacing: 0.03em;
}

.page-hero .breadcrumb a {
  color: var(--ink-mute);
}

.page-hero h1 {
  font-size: clamp(30px, 4vw, 46px);
  max-width: 820px;
  margin-bottom: 18px;
}

.page-hero .lead {
  font-size: 16.5px;
  color: var(--ink-soft);
  max-width: 680px;
}

.page-hero .kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--amber-deep);
  margin-bottom: 22px;
}

/* ---------- 正文排版 ---------- */
.prose {
  font-size: 16.5px;
  line-height: 1.95;
  color: #2c3b35;
}

.prose > * + * {
  margin-top: 1.35em;
}

.prose h2 {
  font-size: 27px;
  margin-top: 2.2em;
  padding-top: 0.2em;
  position: relative;
}

.prose h3 {
  font-size: 20px;
  margin-top: 1.9em;
}

.prose p {
  margin: 0;
}

.prose strong {
  color: var(--teal-deep);
  font-weight: 600;
}

.prose ul,
.prose ol {
  padding-left: 1.3em;
}

.prose li + li {
  margin-top: 0.5em;
}

.prose blockquote {
  margin: 2em 0;
  padding: 24px 28px;
  background: var(--teal-mist);
  border-left: 3px solid var(--teal);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.8;
  color: var(--teal-deep);
}

.prose .callout {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 26px;
  font-size: 15px;
}

.prose .callout h4 {
  font-family: var(--sans);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--amber-deep);
  margin-bottom: 10px;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
}

.prose th,
.prose td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line-soft);
  text-align: left;
  vertical-align: top;
}

.prose th {
  background: var(--cream-deep);
  font-weight: 600;
  font-size: 13.5px;
  color: var(--teal-deep);
  white-space: nowrap;
}

.prose tr:last-child td {
  border-bottom: 0;
}

/* ---------- 文章页布局 ---------- */
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 64px;
  align-items: start;
  padding: 72px 0 96px;
}

.article-head {
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.article-head .cat {
  display: inline-block;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--amber-mist);
  color: var(--amber-deep);
  font-size: 12px;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}

.article-head h1 {
  font-size: clamp(28px, 3.4vw, 40px);
  margin-bottom: 18px;
}

.article-head .meta {
  font-size: 13px;
  color: var(--ink-mute);
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.article-aside {
  position: sticky;
  top: 100px;
  display: grid;
  gap: 20px;
}

.aside-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}

.aside-card h4 {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
  margin-bottom: 14px;
}

.aside-card ul {
  list-style: none;
  display: grid;
  gap: 12px;
}

.aside-card li a {
  font-size: 14px;
  color: var(--ink-soft);
  display: flex;
  gap: 8px;
  line-height: 1.6;
}

.aside-card li a::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--amber);
  margin-top: 9px;
  flex: 0 0 auto;
}

.aside-card li a:hover {
  color: var(--teal);
}

.aside-card--cta {
  background: var(--teal-deep);
  border-color: var(--teal-deep);
  color: rgba(233, 242, 238, 0.8);
}

.aside-card--cta h4 {
  color: #e3bd7c;
}

.aside-card--cta p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 18px;
}

.article-foot {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-mute);
  line-height: 1.8;
}

.related {
  margin-top: 56px;
}

.related h2 {
  font-size: 22px;
  margin-bottom: 22px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.related-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--white);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink);
  display: block;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.related-item:hover {
  border-color: var(--teal);
  transform: translateY(-3px);
  color: var(--ink);
}

.related-item span {
  display: block;
  font-size: 11.5px;
  color: var(--amber-deep);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

/* ---------- 筛选 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 36px;
}

.filter-btn {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink-soft);
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 13.5px;
  cursor: pointer;
  font-family: var(--sans);
  transition: all 0.25s var(--ease);
}

.filter-btn:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.filter-btn.is-active {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
}

/* ---------- FAQ ---------- */
.faq-list {
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 26px 44px 26px 0;
  position: relative;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 12px;
  height: 12px;
  border-right: 1.5px solid var(--amber-deep);
  border-bottom: 1.5px solid var(--amber-deep);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.3s var(--ease);
}

.faq-item[open] summary::after {
  transform: translateY(-30%) rotate(-135deg);
}

.faq-item .answer {
  padding: 0 60px 28px 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.85;
}

/* ---------- 行动区 ---------- */
.cta-band {
  position: relative;
  overflow: hidden;
  background: var(--teal);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 56px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta-band::before {
  content: "";
  position: absolute;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.14);
  right: -110px;
  bottom: -240px;
}

.cta-band h2 {
  font-size: clamp(24px, 2.8vw, 34px);
  color: #fff;
  margin-bottom: 12px;
}

.cta-band p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  max-width: 560px;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: #10231d;
  color: rgba(233, 242, 238, 0.62);
  padding: 68px 0 28px;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .brand-text strong {
  color: #fff;
}

.footer-brand p {
  margin-top: 18px;
  font-size: 13.5px;
  line-height: 1.8;
  max-width: 320px;
  color: rgba(233, 242, 238, 0.55);
}

.footer-col h4 {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: #fff;
  margin-bottom: 18px;
}

.footer-col ul {
  list-style: none;
  display: grid;
  gap: 11px;
}

.footer-col a {
  color: rgba(233, 242, 238, 0.58);
  font-size: 13.5px;
}

.footer-col a:hover {
  color: #e3bd7c;
}

.footer-bottom {
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 12px;
  line-height: 1.8;
  color: rgba(233, 242, 238, 0.4);
}

.footer-bottom .disclaimer {
  max-width: 760px;
}

/* ---------- 动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .btn:hover,
  .pillar:hover,
  .post-card:hover,
  .problem:hover,
  .related-item:hover {
    transform: none;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .hero-visual {
    max-width: 520px;
    margin-inline: auto;
    width: 100%;
  }
  .hero-figure {
    aspect-ratio: 4 / 3.4;
    border-radius: 160px 160px 24px 24px;
  }
  .metrics {
    grid-template-columns: repeat(2, 1fr);
  }
  .metric:nth-child(2) {
    border-right: 0;
  }
  .metric:nth-child(1),
  .metric:nth-child(2) {
    border-bottom: 1px solid var(--line-soft);
  }
  .reason {
    grid-template-columns: 64px 1fr;
  }
  .reason .figure {
    grid-column: 2;
    font-size: 30px;
  }
  .article-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .article-aside {
    position: static;
    grid-template-columns: 1fr 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: grid;
  }
  .nav {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 24px 24px;
    background: var(--cream);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 40px rgba(20, 37, 31, 0.08);
    display: none;
  }
  .nav.is-open {
    display: flex;
  }
  .nav a {
    padding: 13px 16px;
    border-radius: 12px;
  }
  .nav a.is-active::after {
    display: none;
  }
  .nav .nav-cta {
    margin: 8px 0 0;
    text-align: center;
    justify-content: center;
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .calc {
    grid-template-columns: 1fr;
  }
  .calc-form {
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  }
  .cta-band {
    flex-direction: column;
    align-items: flex-start;
    padding: 40px 32px;
  }
}

@media (max-width: 640px) {
  .wrap {
    width: calc(100% - 36px);
  }
  .section {
    padding: 64px 0;
  }
  .section--tight {
    padding: 52px 0;
  }
  .header-inner {
    height: 68px;
  }
  .nav {
    top: 68px;
  }
  .brand-text small {
    display: none;
  }
  .hero {
    padding: 40px 0 60px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .hero-figure {
    border-radius: 120px 120px 20px 20px;
    aspect-ratio: 4 / 4;
  }
  .hero-badge {
    left: 8px;
    bottom: -26px;
    padding: 14px 16px;
  }
  .hero-badge .num {
    font-size: 26px;
  }
  .hero-seal {
    width: 72px;
    height: 72px;
    font-size: 10.5px;
    right: 0;
  }
  .metrics {
    grid-template-columns: 1fr;
    margin-top: -24px;
  }
  .metric {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
    padding: 22px 24px;
  }
  .metric:last-child {
    border-bottom: 0;
  }
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .reason {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 26px 0;
  }
  .reason .idx {
    font-size: 22px;
  }
  .reason .figure {
    grid-column: 1;
  }
  .article-aside {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .cta-band {
    padding: 34px 24px;
  }
  .page-hero {
    padding: 44px 0 40px;
  }
  .prose {
    font-size: 16px;
  }
  .article-layout {
    padding: 44px 0 64px;
  }
  .prose table {
    font-size: 13px;
  }
  .prose th,
  .prose td {
    padding: 10px 12px;
  }
  .faq-item summary {
    font-size: 16.5px;
  }
  .faq-item .answer {
    padding-right: 24px;
  }
}