/* ===========================================================
   陈老师恐艾咨询 · 样式表
   面向全球华人的恐艾 / 健康焦虑中文站
   =========================================================== */

:root {
  --paper: #fbfaf7;
  --ink: #16211d;
  --ink-2: #3f4f4a;
  --ink-3: #8a9994;
  --teal: #1b5e57;
  --teal-deep: #12332f;
  --teal-soft: #edf3f0;
  --clay: #c2683f;
  --line: #e3ded3;
  --line-dark: #2a423c;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    sans-serif;
  --wrap: 1440px;
}

* {
  box-sizing: border-box;
}

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

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

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

a {
  color: var(--teal);
  text-decoration: none;
}

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

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 120px;
}

/* ---------- 顶部说明条 ---------- */
.announce {
  background: var(--teal-deep);
  color: #cfddd8;
  font-size: 12px;
  letter-spacing: 0.6px;
  text-align: center;
  padding: 11px 24px;
}

/* ---------- 导航 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(251, 250, 247, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.nav.is-scrolled {
  border-bottom-color: var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 22px;
  padding-bottom: 22px;
}

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

.brand-mark {
  width: 28px;
  height: 28px;
  border-radius: 2px;
  background: var(--teal);
  color: #fff;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 15px;
  display: grid;
  place-items: center;
}

.brand-name {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 1.2px;
}

.brand-sub {
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 38px;
  font-size: 14px;
  color: var(--ink-2);
}

.nav-links a {
  color: var(--ink-2);
}

.nav-links a:hover {
  color: var(--teal);
}

.btn-nav {
  display: inline-block;
  background: var(--teal);
  color: #fff !important;
  padding: 12px 22px;
  border-radius: 2px;
  font-size: 14px;
  font-weight: 500;
}

.btn-nav:hover {
  background: var(--teal-deep);
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  font-size: 22px;
  color: var(--ink);
  cursor: pointer;
}

/* ---------- 首屏 ---------- */
.hero {
  display: grid;
  grid-template-columns: 1fr 432px;
  gap: 72px;
  align-items: center;
  padding-top: 86px;
  padding-bottom: 94px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 2.6px;
  color: var(--teal);
  margin: 0 0 30px;
}

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

.hero h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 54px;
  line-height: 1.3;
  letter-spacing: 0.5px;
  margin: 0 0 30px;
  color: var(--ink);
}

.hero-sub {
  font-size: 17px;
  line-height: 1.88;
  color: var(--ink-2);
  max-width: 580px;
  margin: 0 0 30px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}

.btn {
  display: inline-block;
  border: 0;
  cursor: pointer;
  font-family: var(--sans);
  padding: 17px 32px;
  border-radius: 2px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.3px;
  transition: background 0.18s ease, transform 0.18s ease;
}

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

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

.btn-ghost {
  color: var(--teal);
  font-size: 15px;
  font-weight: 500;
}

.btn-ghost:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

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

.btn-light:hover {
  background: #eef2f0;
  color: var(--teal-deep);
}

.trust {
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0.3px;
}

/* ---------- 刻度卡 ---------- */
.scale-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 30px 32px 26px;
}

.scale-card h2 {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 3.4px;
  color: var(--ink-3);
  margin: 0 0 6px;
}

.scale-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 0;
  border-top: 1px solid #ede8de;
}

.scale-row:first-of-type {
  border-top: 0;
}

.scale-num {
  font-family: "Inter", var(--sans);
  font-size: 11px;
  font-weight: 500;
  color: #b0bcb7;
  width: 20px;
  flex: 0 0 20px;
}

.scale-time {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 16px;
  color: var(--ink);
  margin: 0 0 6px;
}

.scale-row.is-urgent .scale-time {
  color: var(--clay);
}

.scale-desc {
  font-size: 12px;
  line-height: 1.5;
  color: var(--ink-3);
  margin: 0;
}

/* ---------- 深色问题区 ---------- */
.questions {
  background: var(--teal-deep);
  color: #f4f1ea;
  padding: 90px 0;
}

.section-eyebrow {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 3.4px;
  color: #7fa79e;
  margin: 0 0 16px;
}

.questions h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 37px;
  letter-spacing: 0.5px;
  margin: 0 0 16px;
  color: #f4f1ea;
}

.questions .lede {
  font-size: 15px;
  line-height: 1.75;
  color: #9fb5ae;
  margin: 0 0 46px;
  max-width: 640px;
}

.q-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 64px;
}

.q-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 21px 0;
  border-top: 1px solid var(--line-dark);
  color: #e4ebe8;
  font-size: 16px;
  letter-spacing: 0.3px;
}

.q-grid > .q-col:first-child .q-item:first-child,
.q-grid > .q-col:last-child .q-item:first-child {
  border-top: 0;
}

.q-item:hover {
  color: #fff;
}

.q-item:hover .q-arrow {
  color: #8fb3a9;
  transform: translateX(3px);
}

.q-arrow {
  color: #5f8079;
  font-size: 14px;
  transition: transform 0.18s ease, color 0.18s ease;
}

.more-link {
  display: inline-block;
  margin-top: 26px;
  font-size: 14px;
  font-weight: 500;
  color: #8fb3a9;
  letter-spacing: 0.5px;
}

.more-link:hover {
  color: #cfddd8;
}

/* ---------- 关于 ---------- */
.about {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 72px;
  padding-top: 96px;
  padding-bottom: 96px;
  align-items: start;
}

.about h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 34px;
  line-height: 1.48;
  margin: 18px 0 0;
}

.about p {
  font-size: 16px;
  line-height: 2;
  color: var(--ink-2);
  margin: 0 0 22px;
}

.about .source {
  font-size: 12px;
  line-height: 1.8;
  color: var(--ink-3);
  margin-top: 4px;
}

/* ---------- 联系方式 ---------- */
.contact {
  background: var(--teal);
  color: #fff;
  padding: 90px 0;
  text-align: center;
}

.contact h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 34px;
  letter-spacing: 0.5px;
  margin: 0 0 24px;
  color: #fff;
}

.contact .lede {
  font-size: 15px;
  line-height: 1.75;
  color: #cfe0db;
  margin: 0 auto 40px;
  max-width: 620px;
}

.contact-row {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 56px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.channel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  width: 220px;
}

.ch-div {
  width: 1px;
  height: 250px;
  background: rgba(255, 255, 255, 0.14);
  align-self: center;
}

.qr {
  width: 168px;
  height: 168px;
  background: #fff;
  border-radius: 3px;
  display: grid;
  place-items: center;
  color: #8a9994;
  font-size: 12px;
  letter-spacing: 1px;
  position: relative;
  overflow: hidden;
  margin-bottom: 8px;
}

.qr img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 3px;
}

.ch-label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 3px;
  color: #8fb3a9;
  margin: 0;
}

.ch-id {
  font-family: "Inter", var(--sans);
  font-weight: 600;
  font-size: 24px;
  letter-spacing: 1.2px;
  color: #fff;
  margin: 0;
}

.wx-copy {
  background: none;
  border: 0;
  border-bottom: 1px solid rgba(143, 179, 169, 0.55);
  padding: 0 0 2px;
  font-family: var(--sans);
  font-size: 12px;
  color: #cfe0db;
  cursor: pointer;
  margin: 0;
}

.wx-copy:hover {
  color: #fff;
  border-bottom-color: #fff;
}

.ch-note {
  font-size: 12px;
  line-height: 1.7;
  color: #a8c6bf;
  margin: 2px 0 0;
  max-width: 232px;
}

.contact-alt {
  font-size: 13px;
  color: #a8c6bf;
  margin: 0 0 10px;
}

.contact-warn {
  font-size: 13px;
  color: #a8c6bf;
  margin: 0;
}

/* ---------- 页脚 ---------- */
/* ---------- 404 页 ---------- */
.err {
  padding: 96px 0 112px;
}

.err h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 46px;
  line-height: 1.3;
  letter-spacing: 0.5px;
  color: var(--ink);
  margin: 0;
  max-width: 720px;
}

.err-sub {
  font-size: 17px;
  line-height: 1.95;
  color: var(--ink-2);
  max-width: 620px;
  margin: 22px 0 0;
}

.err-actions {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-top: 42px;
}

.err-note {
  font-size: 15px;
  line-height: 2;
  color: var(--ink-3);
  max-width: 620px;
  margin: 54px 0 0;
}

@media (max-width: 720px) {
  .err {
    padding: 60px 0 70px;
  }
  .err h1 {
    font-size: 32px;
  }
  .err-actions {
    gap: 12px;
  }
}

.site-footer {
  background: #0e1a17;
  padding: 64px 0 36px;
  color: #7d918b;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 64px;
  flex-wrap: wrap;
  padding-bottom: 34px;
}

.footer-brand .brand-name {
  color: #e8efec;
  font-size: 19px;
}

.footer-brand p {
  font-size: 12px;
  line-height: 2;
  color: #7d918b;
  margin: 6px 0 0;
}

.footer-links {
  display: flex;
  gap: 34px;
  flex-wrap: wrap;
  font-size: 13px;
}

.footer-links a {
  color: #96aaa3;
}

.footer-links a:hover {
  color: #cfddd8;
}

.footer-rule {
  height: 1px;
  background: #22322e;
  margin-bottom: 26px;
}

.disclaimer {
  font-size: 12px;
  line-height: 1.8;
  color: #6e8079;
  margin: 0 0 14px;
}

.copyright {
  font-size: 11px;
  color: #55655f;
  letter-spacing: 0.3px;
  margin: 0;
}

/* ---------- 文章页 ---------- */
.article-head {
  padding: 44px 0 0;
  max-width: 800px;
  margin: 0 auto;
}

.breadcrumb {
  font-size: 12px;
  letter-spacing: 0.2px;
  color: var(--ink-3);
  margin-bottom: 26px;
}

.breadcrumb a {
  color: var(--ink-3);
}

.breadcrumb a:hover {
  color: var(--teal);
}

.article-head h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 42px;
  line-height: 1.38;
  margin: 0 0 18px;
}

.article-meta {
  font-size: 12px;
  letter-spacing: 0.2px;
  color: var(--ink-3);
  margin: 0 0 26px;
}

.answer-box {
  background: var(--teal-soft);
  border-radius: 3px;
  padding: 26px 30px;
  margin-bottom: 40px;
}

.answer-box .label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 3px;
  color: var(--teal);
  margin: 0 0 12px;
}

.answer-box p {
  font-size: 17px;
  line-height: 1.88;
  color: #22332e;
  margin: 0;
}

.article-body {
  max-width: 800px;
  margin: 0 auto;
  padding-bottom: 60px;
}

.article-body h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 23px;
  margin: 44px 0 14px;
}

.article-body h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 18px;
  margin: 32px 0 12px;
}

.article-body p {
  font-size: 16px;
  line-height: 2.1;
  color: var(--ink-2);
  margin: 0 0 18px;
}

.article-body ul {
  padding-left: 20px;
  margin: 0 0 18px;
}

.article-body li {
  font-size: 16px;
  line-height: 2.1;
  color: var(--ink-2);
}

.article-body strong {
  color: var(--ink);
  font-weight: 600;
}

.note-inline {
  border-left: 2px solid var(--clay);
  padding: 4px 0 4px 18px;
  margin: 26px 0;
  font-size: 15px;
  line-height: 1.95;
  color: var(--ink-2);
}

.sources {
  border-top: 1px solid var(--line);
  padding-top: 26px;
  margin-top: 44px;
}

.sources .label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 3px;
  color: var(--ink-3);
  margin: 0 0 12px;
}

.sources p {
  font-size: 13px;
  line-height: 1.85;
  color: #6e8079;
  margin: 0;
}

.author-card {
  border-top: 1px solid var(--line);
  padding-top: 26px;
  margin-top: 34px;
  display: flex;
  align-items: center;
  gap: 18px;
}

.avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--line);
  color: var(--ink-2);
  font-family: var(--serif);
  font-weight: 600;
  font-size: 20px;
  display: grid;
  place-items: center;
  flex: 0 0 56px;
}

.author-name {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 15px;
  margin: 0 0 5px;
}

.author-role {
  font-size: 12px;
  color: var(--ink-3);
  margin: 0;
}

.related {
  margin-top: 40px;
}

.related .label {
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 3px;
  color: var(--ink-3);
  margin: 0 0 16px;
}

.related a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 13px 0;
  font-size: 15px;
  color: var(--teal);
  border-bottom: 1px solid #f0ece3;
}

.related a:hover {
  color: var(--teal-deep);
}

.cta-bar {
  background: var(--teal-deep);
  border-radius: 3px;
  padding: 30px 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  margin-top: 44px;
}

.cta-bar h3 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 18px;
  color: #f4f1ea;
  margin: 0 0 7px;
}

.cta-bar p {
  font-size: 13px;
  color: #9fb5ae;
  margin: 0;
}

/* 文章列表页 */
.hub {
  padding-top: 64px;
  padding-bottom: 96px;
}

.hub h1 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 40px;
  margin: 0 0 16px;
}

.hub .lede {
  font-size: 16px;
  color: var(--ink-2);
  margin: 0 0 48px;
  max-width: 620px;
}

.hub-group {
  margin-bottom: 46px;
}

.hub-group h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 22px;
  margin: 0 0 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.hub-group a {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  font-size: 16px;
  color: var(--ink);
  border-bottom: 1px solid #f0ece3;
}

.hub-group a:hover {
  color: var(--teal);
}

/* toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 40px;
  transform: translate(-50%, 20px);
  background: var(--teal-deep);
  color: #fff;
  font-size: 14px;
  padding: 12px 22px;
  border-radius: 2px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 200;
}

.toast.is-on {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) {
  .wrap {
    padding: 0 64px;
  }
  .hero {
    gap: 48px;
  }
  .hero h1 {
    font-size: 46px;
  }
  .about {
    grid-template-columns: 320px 1fr;
    gap: 48px;
  }
}

@media (max-width: 960px) {
  .wrap {
    padding: 0 32px;
  }
  .nav-links {
    display: none;
  }
  .nav-links.is-open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 24px 32px 28px;
  }
  .nav-toggle {
    display: block;
  }
  .nav {
    position: sticky;
  }
  .nav-inner {
    position: relative;
  }
  .hero {
    grid-template-columns: 1fr;
    gap: 44px;
    padding-top: 56px;
    padding-bottom: 64px;
  }
  .hero h1 {
    font-size: 38px;
  }
  .hero-sub {
    font-size: 16px;
  }
  .about {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-top: 64px;
    padding-bottom: 64px;
  }
  .q-grid {
    grid-template-columns: 1fr;
  }
  .q-grid > .q-col:last-child .q-item:first-child {
    border-top: 1px solid var(--line-dark);
  }
  .questions,
  .contact {
    padding: 64px 0;
  }
  .questions h2,
  .contact h2 {
    font-size: 28px;
  }
  .article-head {
    padding-top: 32px;
  }
  .article-head h1 {
    font-size: 30px;
  }
  .cta-bar {
    padding: 24px 22px;
  }
  .channel {
    width: 100%;
    max-width: 320px;
  }
  .ch-div {
    display: none;
  }
  .contact-row {
    gap: 30px;
  }
}

@media (max-width: 560px) {
  .wrap {
    padding: 0 20px;
  }
  .hero h1 {
    font-size: 31px;
  }
  .brand-sub {
    display: none;
  }
  .footer-top {
    gap: 28px;
  }
  .footer-links {
    gap: 22px;
  }
}

/* ===========================================================
   v2 · 专业化视觉层（2026-11-03）
   新增组件：可信度数据条 / 时间轴 / 方法论步骤 / 问题卡片 / 语言切换
   =========================================================== */

:root {
  --radius: 4px;
  --radius-lg: 6px;
  --shadow-1: 0 1px 2px rgba(18, 51, 47, 0.04), 0 10px 30px -18px rgba(18, 51, 47, 0.18);
  --shadow-2: 0 2px 4px rgba(18, 51, 47, 0.05), 0 24px 48px -24px rgba(18, 51, 47, 0.22);
  --ring: 0 0 0 3px rgba(27, 94, 87, 0.16);
}

/* 品牌标记：细描边圆环，比实心方块更克制 */
.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: transparent;
  color: var(--teal);
  border: 1px solid rgba(27, 94, 87, 0.34);
  font-size: 14px;
  letter-spacing: 0;
  box-shadow: inset 0 0 0 3px var(--paper);
}

.brand {
  gap: 10px;
}

.brand-name {
  letter-spacing: 0.6px;
}

/* 语言切换 */
.lang-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px;
  background: #fff;
  font-size: 12px;
  line-height: 1;
}

.lang-switch a {
  padding: 6px 11px;
  border-radius: 999px;
  color: var(--ink-3);
  letter-spacing: 0.6px;
  transition: color 0.16s ease, background 0.16s ease;
}

.lang-switch a:hover {
  color: var(--teal);
}

.lang-switch a.is-current {
  background: var(--teal);
  color: #fff;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 22px;
}

/* 按钮精修 */
.btn {
  border-radius: var(--radius);
  letter-spacing: 0.2px;
}

.btn-primary {
  box-shadow: 0 1px 2px rgba(18, 51, 47, 0.12);
}

.btn-primary:hover {
  box-shadow: 0 2px 8px rgba(18, 51, 47, 0.2);
}

.btn:focus-visible,
.lang-switch a:focus-visible,
a:focus-visible {
  outline: none;
  box-shadow: var(--ring);
  border-radius: var(--radius);
}

/* 首屏背景：极淡的双向晕染，替代纯平底色 */
.hero-shell {
  position: relative;
  overflow: hidden;
}

.hero-shell::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto 40%;
  height: 620px;
  background: radial-gradient(60% 70% at 50% 30%, rgba(27, 94, 87, 0.07), transparent 70%),
    radial-gradient(40% 50% at 80% 10%, rgba(194, 104, 63, 0.06), transparent 70%);
  pointer-events: none;
}

.hero-shell > .wrap {
  position: relative;
}

/* 段标题：编号 + 细线，编辑部式的秩序感 */
.sec-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.sec-head .num {
  font-family: "Inter", var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1.6px;
  color: var(--clay);
  flex: 0 0 auto;
  padding-top: 2px;
}

.sec-head h2 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 30px;
  line-height: 1.35;
  letter-spacing: 0.3px;
  margin: 0;
}

.sec-head .sub {
  margin-left: auto;
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.4px;
  flex: 0 0 auto;
}

/* 可信度数据条 */
.statbar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  margin-top: 4px;
}

.stat {
  padding: 30px 26px 28px;
  border-left: 1px solid var(--line);
}

.stat:first-child {
  border-left: 0;
  padding-left: 0;
}

.stat .v {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 32px;
  line-height: 1;
  color: var(--teal-deep);
  letter-spacing: -0.5px;
  margin: 0 0 10px;
}

.stat .v small {
  font-size: 15px;
  font-weight: 600;
  margin-left: 3px;
  letter-spacing: 0;
}

.stat .k {
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-3);
  letter-spacing: 0.3px;
  margin: 0;
}

/* 时间轴：连续竖轨 + 节点 */
.timeline {
  margin-top: 4px;
  position: relative;
}

.tl-item {
  display: grid;
  grid-template-columns: 148px 1fr;
  gap: 30px;
  padding: 0 0 34px;
  position: relative;
}

.tl-item:last-child {
  padding-bottom: 0;
}

/* 竖线由 .tl-body 的左边框承担，天然与节点同心 */
.tl-item::before {
  display: none;
}

.tl-when {
  font-family: "Inter", var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.3px;
  color: var(--ink-3);
  text-align: right;
  padding-top: 4px;
  line-height: 1.5;
  text-transform: uppercase;
}

.tl-body {
  position: relative;
  padding-left: 28px;
  margin-left: 6px;
  border-left: 1px solid var(--line);
}

.tl-item:last-child .tl-body {
  border-left-color: transparent;
}

.tl-body::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 10px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--paper);
  border: 1.5px solid var(--ink-3);
}

.tl-item.is-urgent .tl-body::before {
  border-color: var(--clay);
  background: var(--clay);
  box-shadow: 0 0 0 4px rgba(194, 104, 63, 0.14);
}

.tl-item.is-urgent .tl-when {
  color: var(--clay);
}

.tl-body h3 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.5;
  margin: 0 0 8px;
  color: var(--ink);
}

.tl-body p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
  margin: 0;
  max-width: 560px;
}

.tl-body .tl-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 500;
  color: var(--teal);
  border-bottom: 1px solid rgba(27, 94, 87, 0.3);
  padding-bottom: 1px;
}

/* 方法论步骤 */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow-1);
}

.step {
  padding: 34px 30px 32px;
  border-left: 1px solid var(--line);
  position: relative;
}

.step:first-child {
  border-left: 0;
}

.step .n {
  font-family: "Inter", var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--clay);
  margin: 0 0 16px;
}

.step h3 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 19px;
  margin: 0 0 10px;
  color: var(--ink);
}

.step p {
  font-size: 14px;
  line-height: 1.9;
  color: var(--ink-2);
  margin: 0;
}

/* 问题卡片 */
.q-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.q-card {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 24px 26px 22px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.03);
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.q-card:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.26);
  transform: translateY(-2px);
}

.q-card .tag {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 1.8px;
  color: #7fa79e;
  text-transform: uppercase;
}

.q-card .t {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.55;
  color: #eef3f1;
  letter-spacing: 0.2px;
}

.q-card .foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 12px;
  color: #78968f;
  margin-top: auto;
}

.q-card:hover .foot .go {
  color: #cfddd8;
}

.q-card .go {
  transition: color 0.18s ease;
}

/* 联系方式卡片化 */
.ch-card {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  padding: 26px 24px 24px;
  background: rgba(255, 255, 255, 0.04);
}

/* 语言切换（页脚用） */
.footer-lang {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: #7d918b;
}

.footer-lang a {
  color: #96aaa3;
}

.footer-lang a.is-current {
  color: #cfddd8;
}

@media (max-width: 1180px) {
  .sec-head h2 {
    font-size: 26px;
  }
}

@media (max-width: 960px) {
  .statbar {
    grid-template-columns: 1fr 1fr;
  }
  .stat {
    padding: 22px 18px;
  }
  .stat:nth-child(odd) {
    border-left: 0;
    padding-left: 0;
  }
  .stat:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }
  .stat .v {
    font-size: 26px;
  }
  .steps {
    grid-template-columns: 1fr;
  }
  .step {
    border-left: 0;
    border-top: 1px solid var(--line);
    padding: 24px 22px;
  }
  .step:first-child {
    border-top: 0;
  }
  .q-cards {
    grid-template-columns: 1fr;
  }
  .tl-item {
    grid-template-columns: 1fr;
    gap: 10px;
    padding-bottom: 28px;
  }
  .tl-item::before {
    display: none;
  }
  .tl-when {
    text-align: left;
    padding-top: 0;
  }
  .tl-body {
    padding-left: 24px;
  }
  .sec-head {
    flex-wrap: wrap;
    gap: 8px;
  }
  .sec-head .sub {
    margin-left: 0;
    width: 100%;
  }
}