/* =========================================================
   Intellignosis · 乳腺癌精准基因检测官网首页
   设计语言参考：Johnson & Johnson 新版品牌系统
   ========================================================= */

/* ---------- design tokens ---------- */
:root {
  --green-500: #00B86B;          /* 主色 生命绿 */
  --green-600: #009A59;
  --green-100: #E8F8EF;
  --green-50:  #F4FBF7;

  --ink-900: #0A1F2E;            /* 主文字色 */
  --ink-700: #2A3F4E;
  --ink-500: #5A6B78;
  --ink-300: #9AA8B3;

  --bg-cream: #F4FBF7;           /* 内容区主背景：极浅生命绿 */
  --bg-cream-2: #E6F4EC;         /* 交替段落背景：稍深生命绿 */
  --line: #E8E6E1;               /* 通用细线（含导航折叠菜单），保持原色 */
  --line-soft: #DCEEE3;          /* 内容区卡片描边：淡绿 */
  --white: #ffffff;

  /* 生命绿主题扩展色 */
  --green-700: #007D48;          /* 深绿，装饰文字 */
  --green-mist: #B8E6CC;         /* 薄荷绿，描边/装饰 */
  --green-leaf: #4A7C59;         /* 苔绿，深沉点缀 */

  --shadow-card: 0 1px 2px rgba(10,31,46,.04), 0 8px 24px rgba(10,31,46,.06);
  --shadow-card-hover: 0 4px 8px rgba(10,31,46,.06), 0 16px 40px rgba(10,31,46,.10);
  --shadow-nav: 0 1px 0 rgba(10,31,46,.06), 0 8px 24px rgba(10,31,46,.06);
  --shadow-green-soft: 0 12px 32px rgba(0, 184, 107, .12);
  --shadow-green-strong: 0 4px 8px rgba(10,31,46,.04), 0 22px 56px rgba(0, 122, 72, .18);

  --radius-card: 16px;
  --radius-pill: 999px;

  --container: 1280px;
  --gutter: clamp(16px, 2.6vw, 40px);

  --font-heading: 'Manrope', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-900);
  background: var(--bg-cream);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11", "kern";
}
main { display: block; margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }
ul { list-style: none; padding: 0; margin: 0; }
h1,h2,h3,h4 { font-family: var(--font-heading); font-weight: 800; letter-spacing: -0.02em; line-height: 1.15; margin: 0; }
p { margin: 0; }

/* 选区颜色：生命绿主题 */
::selection { background: rgba(0, 184, 107, .22); color: var(--ink-900); }
::-moz-selection { background: rgba(0, 184, 107, .22); color: var(--ink-900); }

/* 锚点跳转避开 fixed 导航 */
section[id] { scroll-margin-top: 120px; }

/* ---------- layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* 正文板块（除 nav 和 footer）使用更宽的内容区，
   让设计在大屏不局促 */
.nav .container,
.hero .container,
.pillars .container,
.pillar .container,
.how .container,
.partners .container,
.news .container,
.faq .container {
  max-width: 1600px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-700);
  margin-bottom: 20px;
}
.eyebrow::before {
  content: "";
  width: 32px; height: 2px;
  background: linear-gradient(90deg, var(--green-500), var(--green-mist));
  border-radius: 2px;
}

/* L1 — 主标题（所有 section 统一） */
.section-title {
  font-size: clamp(32px, 3.6vw, 44px);
  font-weight: 800;
  letter-spacing: -0.022em;
  line-height: 1.15;
  color: var(--ink-900);
}

.section-head { margin-bottom: 56px; max-width: 760px; }
.section-head--row {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 32px;
  max-width: none;
}
.section-head--center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  position: relative;
  padding-bottom: 8px;
}
.section-head--center::after {
  content: "";
  display: block;
  width: 56px;
  height: 2px;
  margin: 24px auto 0;
  background: linear-gradient(90deg, transparent, var(--green-500), transparent);
  border-radius: 2px;
}

/* L4 — 副标题（统一字号、间距、颜色） */
.section-subtitle {
  font-size: clamp(15px, 1.2vw, 17px);
  color: var(--ink-500);
  margin: 18px auto 0;
  max-width: 640px;
  line-height: 1.7;
  font-weight: 400;
  letter-spacing: 0;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  white-space: nowrap;
  transition: all .25s ease;
  border: 1.5px solid transparent;
}
.btn--primary { background: var(--green-500); color: var(--white); }
.btn--primary:hover { background: var(--green-600); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(0,184,107,.32); }
.btn--ghost { color: var(--ink-900); border-color: var(--ink-900); }
.btn--ghost:hover { background: var(--ink-900); color: var(--white); }
.btn--white { background: var(--white); color: var(--ink-900); }
.btn--white:hover { transform: translateY(-1px); box-shadow: 0 12px 28px rgba(0,0,0,.16); }
.btn--lg { padding: 16px 28px; font-size: 16px; }
.btn--text {
  padding: 12px 4px;
  color: var(--ink-900);
  font-weight: 700;
  border-radius: 0;
  border-bottom: 2px solid var(--ink-900);
}
.btn--text:hover { color: var(--green-600); border-color: var(--green-500); }
.btn--text-light { color: var(--white); border-color: var(--white); }
.btn--text-light:hover { color: var(--green-100); border-color: var(--green-100); }

.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-heading); font-weight: 700; font-size: 15px;
  color: var(--ink-900);
  border-bottom: 2px solid var(--ink-900);
  padding-bottom: 4px;
  transition: all .25s ease;
}
.link-arrow span { transition: transform .25s ease; }
.link-arrow:hover { color: var(--green-600); border-color: var(--green-500); }
.link-arrow:hover span { transform: translateX(4px); }
.link-arrow--sm { font-size: 14px; }

/* ============ 1. NAV ============ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  transition: box-shadow .25s ease;
}
.nav.is-scrolled { box-shadow: var(--shadow-nav); }

/* --- 上层 utility（半透明深色，可透出底图）--- */
.nav__utility {
  background: rgba(31, 27, 23, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: rgba(255,255,255,0.78);
  font-size: 12px;
}
.nav__utility-inner {
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  height: 36px;
}
.nav__util-left,
.nav__util-right { display: flex; align-items: stretch; gap: 0; }
.nav__util-left li,
.nav__util-right li { display: flex; align-items: stretch; }
.nav__util-left a,
.nav__util-right a,
.nav__lang {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0 14px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 12.5px;
  letter-spacing: 0.01em;
  color: rgba(255,255,255,0.78);
  transition: color .2s ease, background .2s ease;
}
.nav__util-left a:hover,
.nav__util-right a:hover,
.nav__lang:hover { color: var(--white); }
.nav__util-left li:first-child a { padding-left: 0; }
.nav__util-right li:last-child .nav__lang { padding-right: 0; }

/* 当前激活项（白底深字方块）：占据 utility 整个栏高度，
   上下都贴齐，与下方白色主导航无缝连接 */
.nav__util-left li.is-active {
  align-items: stretch;
}
.nav__util-left li.is-active a {
  background: var(--white);
  color: var(--ink-900);
  margin: 0;
  padding: 0 16px;
  font-weight: 700;
  border-radius: 0;
}

/* --- 下层主导航（半透明白底 + 高斯模糊）--- */
.nav__main {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  transition: background .25s ease;
}
.nav.is-scrolled .nav__main {
  background: rgba(255, 255, 255, 0.92);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  height: 112px;
}
.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  color: var(--green-600);
  font-family: var(--font-heading);
}
/* PNG 已紧凑（圆形 logo），直接 100% 显示即可 */
.nav__logo-mark {
  width: 88px;
  height: 88px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.nav__logo-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}
.nav__logo-text { font-size: 34px; font-weight: 800; letter-spacing: -0.035em; }

.nav__menu {
  display: flex;
  align-items: center;
  gap: 36px;
  margin-left: auto;
}
.nav__menu a {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 16px;
  color: var(--ink-900);
  position: relative;
  padding: 6px 0;
  transition: color .2s ease;
}
.nav__menu a:hover { color: var(--green-600); }
.nav__menu a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--green-500);
  transition: width .25s ease;
}
.nav__menu a:hover::after { width: 100%; }

.nav__actions { display: flex; align-items: center; gap: 12px; }
.nav__actions .btn { padding: 10px 18px; font-size: 14px; }

.nav__toggle {
  display: none;
  width: 44px; height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}
.nav__toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--ink-900);
  border-radius: 2px;
  transition: transform .25s ease, opacity .25s ease;
}
.nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
.nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ 2. HERO ============ */
/* === HERO（全屏轮播，圆形蒙版扩散动画 - 可整体暂停）=== */
.hero {
  position: relative;
  display: block;
  width: 100%;
  margin: 0;
  padding: 0;
  /* 全屏覆盖到导航栏后面 */
  min-height: 100vh;
  overflow: hidden;
  background: #0F1115;
  color: var(--white);
}

/* 轮播容器：覆盖整个 hero */
.hero__slides {
  position: absolute;
  inset: 0;
  z-index: 0;
}

/* 单张幻灯片：默认隐藏（clip-path 0%）*/
.hero__slide {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  clip-path: circle(0% at 50% 50%);
  -webkit-clip-path: circle(0% at 50% 50%);
}
/* 进入动画：从圆心扩散到全屏 */
.hero__slide.is-active {
  z-index: 2;
  pointer-events: auto;
  animation: heroSlideIn 1s cubic-bezier(0.65, 0, 0.35, 1) forwards;
}
/* 旧幻灯片：上一帧仍然可见在底层，新片完成扩散后再消失 */
.hero__slide.was-active {
  z-index: 1;
  clip-path: circle(150% at 50% 50%);
  -webkit-clip-path: circle(150% at 50% 50%);
}
@keyframes heroSlideIn {
  from { clip-path: circle(0% at 50% 50%);   -webkit-clip-path: circle(0% at 50% 50%); }
  to   { clip-path: circle(150% at 50% 50%); -webkit-clip-path: circle(150% at 50% 50%); }
}

/* 背景图：全 bleed */
.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
  display: block;
}
.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
}
/* 仅当前激活的图慢推近，营造电影感 */
.hero__slide.is-active .hero__media img {
  animation: heroKenBurns 7s ease-out forwards;
}
@keyframes heroKenBurns {
  from { transform: scale(1.08); }
  to   { transform: scale(1.00); }
}

/* === 暂停状态：所有动画一起冻结 === */
.hero.is-paused .hero__slide,
.hero.is-paused .hero__slide.is-active,
.hero.is-paused .hero__slide.is-active .hero__media img {
  animation-play-state: paused !important;
}

/* 渐变蒙版：左下深 → 右上轻 */
.hero__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  /* 仅在标题/按钮区域做小幅暗化，保证文字可读，不染色整张图 */
  background:
    radial-gradient(ellipse 65% 55% at 50% 55%,
      rgba(0, 0, 0, 0.36) 0%,
      rgba(0, 0, 0, 0.18) 55%,
      rgba(0, 0, 0, 0.00) 80%);
}

/* === Hero 正中内容（大标题与按钮）=== */
.hero__content {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  pointer-events: none; /* 让事件穿透到下方的按钮 */
}
.hero__title {
  color: var(--white);
  font-family: var(--font-heading);
  font-size: clamp(48px, 6vw, 84px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
  text-shadow: 0 4px 24px rgba(0,0,0,0.15);
  pointer-events: auto;
}
.hero__subtitle {
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(16px, 1.8vw, 22px);
  line-height: 1.6;
  max-width: 760px;
  margin-bottom: 48px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.2);
  pointer-events: auto;
}

/* 带有由中心向两边扩散 hover 效果的按钮 */
.btn-pg-sweep {
  position: relative;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 16px 36px;
  background: var(--green-500);
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  border-radius: 999px;
  text-decoration: none;
  pointer-events: auto;
  box-shadow: 0 4px 16px rgba(0, 184, 107, 0.25);
  transition: color 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s ease;
}
.btn-pg-sweep span,
.btn-pg-sweep svg {
  position: relative;
  z-index: 1;
}
/* 隐藏的白色扩散背景 */
.btn-pg-sweep::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0%;
  background: var(--white);
  z-index: 0;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn-pg-sweep:hover {
  color: var(--green-600);
  box-shadow: 0 6px 24px rgba(255, 255, 255, 0.2);
}
.btn-pg-sweep:hover::before {
  width: 100%;
}

/* === 暂停/播放按钮（右下角，PG 风格 + 伪元素动态切换）=== */
.hero__pause {
  position: absolute;
  bottom: 80px;
  right: clamp(20px, 3vw, 48px);
  z-index: 10;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: 2.5px solid rgba(255,255,255,0.35);
  background: var(--green-500);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background .25s ease, transform .25s ease, border-color .25s ease;
  padding: 0;
  box-shadow: 0 4px 16px rgba(0,184,107,.3);
}
.hero__pause:hover {
  background: var(--green-600);
  border-color: rgba(255,255,255,0.55);
  transform: scale(1.08);
}

/* --- 图标容器（承载 ::before / ::after 伪元素）--- */
.hero__pause-icon {
  position: relative;
  width: 22px;
  height: 22px;
  display: block;
}

/* ===== 默认：暂停态 ⏸（两条竖线）===== */
.hero__pause-icon::before,
.hero__pause-icon::after {
  content: "";
  position: absolute;
  top: 1px;
  width: 4px;
  height: 20px;
  background: var(--white);
  border-radius: 1.5px;
  border: none;
  transition: all .4s cubic-bezier(.4, 0, .2, 1);
}
.hero__pause-icon::before {
  left: 4px;
}
.hero__pause-icon::after {
  right: 4px;
}

/* ===== 播放态 ▶（CSS 三角形）===== */
/* ::before 变成三角：清除宽高和背景，用 border 画三角 */
.hero.is-paused .hero__pause-icon::before {
  top: 2px;
  left: 6px;
  width: 0;
  height: 0;
  background: transparent;
  border-radius: 0;
  border-style: solid;
  border-width: 9px 0 9px 14px;
  border-color: transparent transparent transparent var(--white);
}
/* ::after 隐藏（缩为 0 + 透明） */
.hero.is-paused .hero__pause-icon::after {
  width: 0;
  height: 0;
  right: 4px;
  opacity: 0;
}

/* === Hero 底部横栏（PG 风格，固定在屏幕底部）=== */
.hero__bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: var(--green-500);
  transition: opacity .35s ease, transform .35s ease;
}
.hero__bar.is-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}
.hero__bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 44px;
  gap: 24px;
}
.hero__bar-left {
  display: flex;
  align-items: center;
  gap: 0;
}
.hero__bar-left li {
  display: flex;
  align-items: center;
}
.hero__bar-left li + li::before {
  content: "";
  display: inline-block;
  width: 1px;
  height: 14px;
  background: rgba(255,255,255,0.4);
  margin: 0 4px;
}
.hero__bar-left a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 14px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 12.5px;
  color: var(--white);
  letter-spacing: 0.01em;
  transition: opacity .2s ease;
}
.hero__bar-left a:hover { opacity: 0.8; }
.hero__bar-center {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 12.5px;
  color: rgba(255,255,255,0.85);
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.hero__bar-right-link {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 12.5px;
  color: var(--white);
  letter-spacing: 0.01em;
  transition: opacity .2s ease;
  white-space: nowrap;
}
.hero__bar-right-link:hover { opacity: 0.8; }

/* ============ 3. PILLARS（三大版块）============ */
/* --- 圆弧过渡：pillars 顶部向上凸起，覆盖在 hero 之上 --- */
.pillars {
  position: relative;
  z-index: 2;
  margin-top: -30px;
  padding: clamp(60px, 7vw, 100px) 0 clamp(56px, 7vw, 96px);
  background: var(--bg-cream);
  border-top-left-radius: 50% 20px;
  border-top-right-radius: 50% 20px;
  overflow: hidden;
}
.pillars::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 380px;
  background:
    radial-gradient(ellipse 65% 100% at 50% 0%, rgba(0, 184, 107, .10), transparent 70%),
    radial-gradient(circle 480px at 12% 18%, rgba(184, 230, 204, .35), transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.pillars > .container { position: relative; z-index: 1; }

/* 标题样式微调（仅限 pillars 板块） */
.pillars__head::after { display: none !important; }
.pillars__head { padding-bottom: 0; }
.pillars__title {
  font-size: clamp(30px, 3.2vw, 40px);
  font-weight: 700;
  letter-spacing: -0.012em;
  line-height: 1.25;
  display: inline-block;
}
.pillars__title-accent {
  background: linear-gradient(90deg, var(--green-600), var(--green-500));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-left: 0.18em;
  font-weight: 800;
}

.pillar { padding: clamp(40px, 6vw, 80px) 0; }
.pillar--alt-a,
.pillar--alt-b { background: var(--bg-cream); }

.pillar__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 96px);
  align-items: center;
}
.pillar__grid--reverse .pillar__media { order: 2; }

.pillar__media {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
  aspect-ratio: 5/4;
  box-shadow: var(--shadow-card);
  transition: box-shadow .5s cubic-bezier(.2,.7,.2,1), transform .5s cubic-bezier(.2,.7,.2,1);
}
.pillar__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s cubic-bezier(.2,.7,.2,1); }
.pillar:hover .pillar__media { box-shadow: var(--shadow-green-strong); transform: translateY(-3px); }
.pillar:hover .pillar__media img { transform: scale(1.05); }

.pillar__num {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 13px;
  color: var(--green-700);
  letter-spacing: 0.14em;
  margin-bottom: 20px;
  padding: 7px 16px 7px 12px;
  background: rgba(255, 255, 255, .6);
  border: 1.5px solid var(--green-mist);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(6px);
}
.pillar__num::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green-500);
  box-shadow: 0 0 0 4px rgba(0, 184, 107, .18);
}
/* L2 — 子标题（pillar 各模块） */
.pillar__title {
  font-size: clamp(24px, 2.4vw, 32px);
  font-weight: 800;
  letter-spacing: -0.018em;
  line-height: 1.2;
  margin-bottom: 18px;
  color: var(--ink-900);
}
/* L5 — 正文段落 */
.pillar__lead {
  font-size: 16px;
  color: var(--ink-500);
  margin: 0 0 28px;
  line-height: 1.75;
  letter-spacing: 0.005em;
  max-width: 56ch;
}
.pillar__points {
  display: grid;
  gap: 14px;
  margin-bottom: 32px;
}
.pillar__points li {
  position: relative;
  padding-left: 34px;
  font-size: 15px;
  color: var(--ink-700);
  line-height: 1.6;
}
.pillar__points li::before {
  content: "";
  position: absolute;
  left: 0; top: 4px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--green-100);
  box-shadow: inset 0 0 0 1.5px var(--green-mist);
  transition: transform .3s ease, background .3s ease, box-shadow .3s ease;
}
.pillar__points li::after {
  content: "";
  position: absolute;
  left: 6px; top: 9px;
  width: 8px; height: 4px;
  border-left: 1.8px solid var(--green-600);
  border-bottom: 1.8px solid var(--green-600);
  transform: rotate(-45deg);
}
.pillar:hover .pillar__points li::before {
  background: var(--green-500);
  box-shadow: inset 0 0 0 1.5px var(--green-500);
}
.pillar:hover .pillar__points li::after {
  border-color: var(--white);
}

/* ============ 4. HOW（极简流程，品牌绿协调）============ */
.how {
  position: relative;
  padding: clamp(56px, 7vw, 96px) 0;
  background: var(--bg-cream);
}
/* 与上一段同色的轻分隔（pillar 末段 → how） */
.how::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: clamp(120px, 14vw, 220px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--green-mist), transparent);
}

.how__flow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.how__item {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  text-align: center;
  transition: transform .3s ease;
}
.how__item:hover { transform: translateY(-4px); }
.how__icon {
  position: relative;
  width: 120px;
  height: 120px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--green-700);
  background:
    radial-gradient(circle at 30% 25%, #ffffff 0%, #f5fbf7 65%, #eaf5ee 100%);
  border: 1px solid var(--green-mist);
  border-radius: 50%;
  box-shadow:
    0 6px 16px rgba(0, 184, 107, .10),
    0 1px 2px rgba(10, 31, 46, .04),
    inset 0 0 0 4px rgba(255, 255, 255, .9);
  transition: color .4s ease, background .4s ease, box-shadow .4s ease, border-color .4s ease, transform .4s cubic-bezier(.2,.7,.2,1);
}
.how__icon::before {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1.5px dashed var(--green-mist);
  opacity: .55;
  pointer-events: none;
  animation: how-ring-spin 18s linear infinite;
}
.how__icon svg {
  width: 56px;
  height: 56px;
  position: relative;
  z-index: 1;
  transition: transform .5s cubic-bezier(.2,.7,.2,1);
}
.how__item:hover .how__icon {
  color: var(--green-600);
  background:
    radial-gradient(circle at 30% 25%, #ffffff 0%, var(--green-50) 60%, #d8efe1 100%);
  border-color: var(--green-500);
  box-shadow:
    0 14px 36px rgba(0, 184, 107, .22),
    0 2px 4px rgba(10, 31, 46, .04),
    inset 0 0 0 4px rgba(255, 255, 255, .85);
}
.how__item:hover .how__icon svg { transform: scale(1.08); }
.how__item:hover .how__icon::before {
  border-color: var(--green-500);
  opacity: .85;
}
@keyframes how-ring-spin {
  to { transform: rotate(360deg); }
}

/* 图标内的强调线/填充：用品牌绿替代原来的蓝 */
.how__accent { stroke: var(--green-500); stroke-width: 2.6; }
.how__accent-fill { fill: var(--green-500); stroke: var(--green-500); }

.how__label {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 16px;
  color: var(--ink-700);
  letter-spacing: -0.005em;
}
.how__label span {
  color: var(--ink-300);
  margin-right: 6px;
  font-weight: 700;
}
.how__chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--green-500);
  flex: 1 1 0;
  max-width: 80px;
  margin-bottom: 56px;
  position: relative;
  height: 32px;
  overflow: visible;
}
.how__chevron svg {
  width: 32px;
  height: 32px;
  filter: drop-shadow(0 0 6px rgba(0, 184, 107, .25));
  animation: how-chevron-flow 1.6s cubic-bezier(.4,0,.2,1) infinite;
}
.how__chevron:nth-of-type(2) svg { animation-delay: .2s; }
.how__chevron:nth-of-type(4) svg { animation-delay: .4s; }
.how__chevron:nth-of-type(6) svg { animation-delay: .6s; }

@keyframes how-chevron-flow {
  0%   { transform: translateX(-10px); opacity: 0; }
  25%  { opacity: 1; }
  60%  { transform: translateX(0); opacity: 1; }
  100% { transform: translateX(12px); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .how__icon::before,
  .how__chevron svg { animation: none; }
}


/* ============ 6. PARTNERS（合作伙伴 logo 网格）============ */
.partners {
  position: relative;
  padding: clamp(56px, 7vw, 96px) 0;
  background: var(--bg-cream);
}
/* 与上一段同色的轻分隔（how → partners） */
.partners::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: clamp(120px, 14vw, 220px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--green-mist), transparent);
}
.partners__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.partner {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border: 1px solid var(--line-soft);
  border-radius: 12px;
  padding: 22px 24px;
  min-height: 96px;
  transition: transform .35s cubic-bezier(.2,.7,.2,1), box-shadow .35s ease, border-color .25s ease;
}
.partner:hover {
  transform: translateY(-4px);
  border-color: var(--green-mist);
  box-shadow: 0 4px 8px rgba(10,31,46,.05), 0 18px 40px rgba(0, 184, 107, .14);
}
.partner img {
  max-width: 100%;
  max-height: 56px;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  transition: transform .4s cubic-bezier(.2,.7,.2,1);
}
.partner:hover img {
  transform: scale(1.04);
}

/* ============ 5. NEWS ============ */
.news {
  position: relative;
  padding: clamp(56px, 7vw, 96px) 0;
  background: var(--bg-cream);
}
/* 与上一段同色的轻分隔（partners → news） */
.news::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: clamp(120px, 14vw, 220px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--green-mist), transparent);
}
/* —— 新闻横向滑块 —— */
.news__viewport {
  overflow: hidden;
  position: relative;
}
.news__track {
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 4px 0 8px;
  list-style: none;
  transition: transform .55s cubic-bezier(.2, .7, .2, 1);
  will-change: transform;
}
.news-item {
  flex: 0 0 calc((100% - 56px) / 3);
  min-width: 0;
}
.news-item > a {
  display: flex;
  flex-direction: column;
  height: 100%;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background: var(--white);
  color: var(--ink-900);
  text-decoration: none;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform .4s cubic-bezier(.2,.7,.2,1), box-shadow .4s ease, border-color .3s ease;
}
.news-item > a:hover {
  transform: translateY(-6px);
  border-color: var(--green-mist);
  box-shadow: 0 4px 8px rgba(10,31,46,.05), 0 22px 56px rgba(0, 184, 107, .14);
}
.news-item__media {
  display: block;
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-cream);
}
.news-item__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 1s cubic-bezier(.2,.7,.2,1);
}
.news-item > a:hover .news-item__media img { transform: scale(1.07); }
.news-item__body {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 24px 26px 28px;
  flex: 1;
}
.news-item__date {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ink-500);
}
.news-item__title {
  font-size: 18px;
  line-height: 1.45;
  font-weight: 700;
  letter-spacing: -0.012em;
  color: var(--ink-900);
  margin: 0;
  flex: 1;
}
.news-item__more {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 13.5px;
  color: var(--green-700);
  position: relative;
  padding-bottom: 2px;
}
.news-item__more::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%;
  height: 1.5px;
  background: var(--green-500);
  transform-origin: left;
  transform: scaleX(.4);
  transition: transform .35s cubic-bezier(.2,.7,.2,1);
}
.news-item > a:hover .news-item__more::after { transform: scaleX(1); }

/* —— 翻页栏：长横线 + 圆形按钮 —— */
.news__pager {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-top: 48px;
}
.news__pager-track {
  position: relative;
  flex: 1;
  height: 1px;
}
.news__pager-line {
  position: absolute;
  inset: 0;
  background: #ffffff;
  box-shadow: inset 0 0 0 1px rgba(10, 31, 46, .08);
}
.news__pager-progress {
  position: absolute;
  top: 0;
  left: 0;
  height: 1px;
  width: 0;
  background: var(--ink-900);
  transition: width .55s cubic-bezier(.2,.7,.2,1);
}
.news__pager-controls {
  display: flex;
  gap: 14px;
}
.news__pager-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--green-500);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(0, 184, 107, .28);
  transition: transform .25s ease, background .25s ease, box-shadow .25s ease;
}
.news__pager-btn:hover {
  background: var(--green-600);
  transform: translateY(-2px);
  box-shadow: 0 12px 22px rgba(0, 184, 107, .38);
}
.news__pager-btn:active { transform: translateY(0); }
.news__pager-btn:disabled {
  background: #E0E0E0;
  color: #fff;
  cursor: not-allowed;
  box-shadow: none;
  transform: none;
}
.news__pager-btn svg { width: 18px; height: 18px; }
.news__pager-btn.is-focus {
  outline: 2px solid var(--ink-900);
  outline-offset: 3px;
}

/* ============ 7. FAQ（常见问题，ZA Insure 风格）============ */
.faq {
  padding: clamp(56px, 7vw, 96px) 0;
  background: var(--bg-cream);
}
.faq .section-head {
  text-align: center;
  margin-bottom: 48px;
  max-width: none;
}
.faq__list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 932px;
  margin: 0 auto;
  padding: 0;
  list-style: none;
}
.faq__item {
  position: relative;
  background: transparent;
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
  transition: background .35s ease, border-color .25s ease;
}
.faq__item:first-child {
  border-top: 1px solid var(--line-soft);
}
.faq__item::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--green-500);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .35s cubic-bezier(.2,.7,.2,1);
  border-radius: 0 2px 2px 0;
}
.faq__item.is-open {
  background: linear-gradient(90deg, rgba(0, 184, 107, .06) 0%, transparent 60%);
}
.faq__item.is-open::before {
  transform: scaleY(1);
}
.faq__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 20px 26px 24px;
  background: transparent;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-heading);
  transition: padding .25s ease;
}
/* L3 — FAQ 问句标题，与卡片标题同级 */
.faq__q-text {
  font-size: 19px;
  font-weight: 600;
  color: var(--ink-900);
  letter-spacing: -0.012em;
  line-height: 1.5;
  transition: color .25s ease;
}
.faq__question:hover .faq__q-text {
  color: var(--green-600);
}
.faq__arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  color: #999999;
  flex-shrink: 0;
  transition: transform .35s ease, color .25s ease;
}
.faq__arrow svg { width: 100%; height: 100%; }
.faq__item.is-open .faq__arrow {
  color: var(--green-600);
  transform: rotate(180deg);
}

/* 答案区：默认收起，展开时高度自动计算 */
.faq__answer {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .35s ease;
}
.faq__answer-inner {
  overflow: hidden;
  opacity: 0;
  transition: opacity .3s ease;
}
.faq__answer-inner p {
  margin: 0 0 12px;
  padding: 0 20px 0 24px;
  font-size: 15.5px;
  line-height: 1.78;
  letter-spacing: 0.005em;
  color: var(--ink-500);
}
.faq__answer-inner p:last-child {
  margin-bottom: 0;
  padding-bottom: 32px;
}
.faq__item.is-open .faq__answer { grid-template-rows: 1fr; }
.faq__item.is-open .faq__answer-inner { opacity: 1; }

.faq__more {
  margin-top: 32px;
  text-align: center;
}

/* ============ 7. FOOTER (ACT-style) ============ */
.footer {
  background: var(--ink-900);
  color: rgba(255,255,255,0.78);
  padding: 48px 0 24px;
}

/* ---- 上行：左 logo / 右 链接列 ---- */
.footer__top {
  display: grid;
  grid-template-columns: 1.1fr 2.4fr;
  gap: 80px;
  padding-bottom: 20px;
}

.footer__brand { display: flex; flex-direction: column; }
.footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  color: var(--white);
  align-self: flex-start;
  margin-bottom: 0;
}
.footer__logo-badge {
  width: 72px;
  height: 72px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
/* 圆形 logo 直接显示，加绿色光晕在深底上更醒目 */
.footer__logo-badge img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  filter: drop-shadow(0 4px 16px rgba(0, 184, 107, 0.45));
}
.footer__logo-text {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.035em;
  color: var(--white);
}


.footer__cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.footer__cols h4 {
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-heading);
  color: rgba(255,255,255,0.45);
  margin-bottom: 22px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.footer__cols ul { display: grid; gap: 14px; }
.footer__cols a {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: var(--white);
  transition: color .2s ease;
}
.footer__cols a:hover { color: var(--green-500); }

/* ---- 中行：订阅 + 社媒（无上方横线）---- */
.footer__middle {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  padding: 12px 0 12px;
  border-bottom: 1px solid rgba(255,255,255,0.10);
  align-items: end;
}

.subscribe {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 480px;
}
.subscribe__label {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 18px;
  line-height: 1;
  color: var(--white);
  letter-spacing: -0.005em;
  margin: 0;
}
/* 极简下划线式：input 仅底部一条横线 + 白字描边胶囊按钮 */
.subscribe__field {
  display: flex;
  align-items: center;
  gap: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.55);
  padding: 0 0 8px;
  transition: border-color .2s ease;
}
.subscribe__field:focus-within {
  border-color: var(--white);
}
.subscribe__field input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: 0;
  padding: 10px 0;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--white);
  min-width: 0;
}
.subscribe__field input::placeholder { color: rgba(255,255,255,0.45); }
.subscribe__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 28px;
  border: 1.5px solid var(--white);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--white);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}
.subscribe__btn:hover {
  background: var(--white);
  color: var(--ink-900);
}
.subscribe__msg {
  margin: 0;
  font-family: var(--font-body);
  font-size: 13px;
  min-height: 1em;
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity .3s ease, transform .3s ease;
  pointer-events: none;
}
.subscribe__msg.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.subscribe__msg--success { color: var(--green-500); }
.subscribe__msg--error   { color: #ff7070; }

/* 右侧：微信二维码卡片 */
.footer__bar-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 14px;
}
.footer__social-label {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1;
  text-transform: uppercase;
  color: rgba(255,255,255,0.45);
}
.footer__qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.footer__qr-image {
  position: relative;
  background: var(--white);
  padding: 10px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
  transition: transform .35s cubic-bezier(.2,.7,.2,1), box-shadow .35s ease;
  line-height: 0;
}
.footer__qr-image:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}
.footer__qr-image img {
  width: 110px;
  height: 110px;
  object-fit: cover;
  display: block;
  border-radius: 6px;
}

/* ---- 底行：版权 + 法律链接（| 分隔单行）---- */
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding-top: 12px;
  flex-wrap: wrap;
}
.footer__bottom small {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  font-family: var(--font-heading);
  font-weight: 600;
}
.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
}
.footer__legal li {
  display: inline-flex;
  align-items: center;
}
.footer__legal li + li::before {
  content: "";
  display: inline-block;
  width: 1px;
  height: 12px;
  background: rgba(255,255,255,0.20);
  margin: 0 16px;
}
.footer__legal a,
.footer__disclaimer {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  transition: color .2s ease;
}
.footer__legal a:hover { color: var(--white); }
.footer__disclaimer { font-style: italic; }

/* ============ RESPONSIVE ============ */

/* Tablet */
@media (max-width: 1024px) {
  .nav__utility { display: none; }
  .nav__menu { display: none; }
  .nav__toggle { display: flex; }
  .nav__menu.is-open {
    display: flex;
    position: absolute;
    top: 112px; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--white);
    box-shadow: var(--shadow-nav);
    padding: 8px var(--gutter);
  }
  .nav__menu.is-open a {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
  }

  .hero { min-height: 100vh; }
  .pillars {
    margin-top: -20px;
    border-top-left-radius: 50% 14px;
    border-top-right-radius: 50% 14px;
    padding-top: clamp(48px, 6vw, 80px);
  }

  .pillar__grid { grid-template-columns: 1fr; gap: 40px; }
  .pillar__grid--reverse .pillar__media { order: 0; }

  .how__flow { flex-wrap: wrap; gap: 24px 16px; justify-content: center; }
  .how__chevron { display: none; }
  .how__item { flex: 0 0 calc(50% - 16px); }

  .partners__grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }

  .news-item { flex: 0 0 calc((100% - 24px) / 2); }
  .news__pager { gap: 18px; margin-top: 36px; }

  .faq__question { padding: 22px 20px 22px 24px; gap: 16px; }
  .faq__q-text { font-size: 17px; }
  .faq__arrow { width: 24px; height: 24px; }

  .hero__bar-inner { height: 38px; }
  .hero__bar-left a,
  .hero__bar-center,
  .hero__bar-right-link { font-size: 11.5px; }

  .footer__top { grid-template-columns: 1fr; gap: 48px; padding-bottom: 20px; }
  .footer__cols { grid-template-columns: repeat(2, 1fr); gap: 40px 24px; }
  .footer__middle { grid-template-columns: 1fr; gap: 32px; padding: 12px 0; align-items: stretch; }
  .footer__bar-right { justify-content: flex-start; }
}

/* Mobile */
@media (max-width: 640px) {
  .nav__inner { height: 60px; gap: 12px; }
  .nav__logo-text { font-size: 22px; }
  .nav__logo-mark { width: 28px; height: 28px; }
  .nav__actions .btn--ghost { padding: 8px 14px; font-size: 13px; }
  .nav__actions .btn--primary { display: none; }
  .nav__menu.is-open { top: 60px; }

  .hero { min-height: 100vh; }
  .hero__bar { display: none; }
  .pillars {
    margin-top: -14px;
    border-top-left-radius: 50% 10px;
    border-top-right-radius: 50% 10px;
    padding-top: clamp(40px, 5vw, 60px);
  }
  .hero__pause { width: 44px; height: 44px; bottom: 70px; }
  .hero__pause-icon { transform: scale(0.8); }

  .section-head--row { flex-direction: column; align-items: flex-start; gap: 16px; }
  .section-head { margin-bottom: 40px; }
  .section-title { font-size: 28px; line-height: 1.2; }
  .section-subtitle { font-size: 15px; }

  .pillar__title { font-size: 22px; }
  .pillar__lead { font-size: 15.5px; line-height: 1.7; }
  .news-item { flex: 0 0 100%; }
  .news-item__title { font-size: 17px; }
  .news__pager-btn { width: 42px; height: 42px; }
  .faq__q-text { font-size: 16px; }
  .faq__answer > p { font-size: 15px; }

  /* 手机：检测流程改为单列 */
  .how__flow { flex-direction: column; gap: 32px; }
  .how__item { flex: 1 1 auto; width: 100%; }
  .how__icon { width: 80px; height: 80px; }
  .how__icon svg { width: 60px; height: 60px; }

  .partners__grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .partner { padding: 16px; min-height: 80px; }
  .partner img { max-height: 44px; }

  .footer__cols { grid-template-columns: 1fr; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* =========================================================
   ARTICLE PAGE · 新闻动态详情页
   极简编辑器风格：白底 / 黑字 / 灰色辅助 / 无装饰色块
   ========================================================= */

body.article-page { background: var(--white); }
body.article-page main { padding-top: 116px; }

.article {
  background: var(--white);
  padding: 32px 0 80px;
}

.article__container {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* 面包屑 */
.article__crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-500);
  margin-bottom: 40px;
}
.article__crumbs a { color: var(--ink-500); transition: color .2s ease; }
.article__crumbs a:hover { color: var(--ink-900); text-decoration: underline; }
.article__crumb-sep { color: var(--ink-300); }
.article__crumb-current { color: var(--ink-700); }

/* 头部：标题 + meta（细横线分隔） */
.article__header {
  padding-bottom: 18px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--line);
}
.article__title {
  font-size: clamp(24px, 3.2vw, 32px);
  line-height: 1.45;
  color: var(--ink-900);
  font-weight: 700;
  letter-spacing: 0;
  margin-bottom: 16px;
}
.article__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--ink-500);
  font-weight: 400;
}
.article__divider { color: var(--ink-300); }
.article__date,
.article__editor,
.article__read { color: var(--ink-500); }

/* 正文：纯文字、无装饰 */
.article__body {
  font-size: 16px;
  line-height: 1.95;
  color: var(--ink-900);
}
.article__body > p {
  margin: 0 0 20px;
  text-align: justify;
  text-justify: inter-ideograph;
}

/* 导语：与普通段落保持一致，仅略加重 */
.article__lead {
  font-weight: 500;
  color: var(--ink-900);
}

/* H2：朴素粗体，不加颜色块/边线 */
.article__h2 {
  font-family: var(--font-body);
  font-size: 18px;
  font-weight: 700;
  color: var(--ink-900);
  line-height: 1.5;
  letter-spacing: 0;
  margin: 36px 0 14px;
}

/* 列表：圆点 + 灰色 */
.article__list {
  margin: 0 0 22px;
  padding: 0 0 0 22px;
  list-style: disc;
  color: var(--ink-900);
}
.article__list li {
  margin-bottom: 8px;
  line-height: 1.9;
  padding-left: 4px;
}
.article__list li::marker { color: var(--ink-300); }

/* 文章图：左对齐、淡灰底、无圆角无阴影 */
.article__figure {
  margin: 28px 0;
  background: #FAFAFA;
  padding: 18px;
  text-align: center;
}
.article__figure img {
  width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}
.article__caption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-500);
  text-align: center;
  line-height: 1.6;
}

/* 媒体来源：极简、小字、单段紧凑 */
.article__source {
  margin-top: 56px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.article__source-label {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-700);
  margin-bottom: 8px;
  letter-spacing: 0;
  text-transform: none;
}
.article__source-label::before { content: none; }
.article__source-refs {
  font-size: 11.5px;
  line-height: 1.75;
  color: var(--ink-500);
  margin: 0 0 10px;
  text-align: justify;
}
.article__source-refs em {
  font-style: italic;
  color: var(--ink-700);
}
.article__source-disclaimer {
  font-size: 11.5px;
  line-height: 1.75;
  color: var(--ink-300);
  margin: 0;
}

/* 文末导航：仅文字 + 细线 */
.article__nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.article__nav-back,
.article__nav-next {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 400;
  color: var(--ink-500);
  transition: color .2s ease;
}
.article__nav-back:hover,
.article__nav-next:hover { color: var(--ink-900); }
.article__nav-next { text-align: right; }

/* 响应式 */
@media (max-width: 720px) {
  body.article-page main { padding-top: 96px; }
  .article { padding: 20px 0 48px; }
  .article__title { font-size: 22px; }
  .article__body { font-size: 15px; line-height: 1.9; }
  .article__h2 { font-size: 17px; margin: 28px 0 12px; }
  .article__figure { padding: 12px; }
  .article__nav { flex-direction: column; align-items: flex-start; }
  .article__nav-next { text-align: left; }
}

/* ---------- 置顶按钮 Back to top ---------- */
main {
  position: relative;
}

.back-to-top {
  position: fixed;
  right: 28px;
  bottom: 32px;
  z-index: 90;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(0, 184, 107, 0.35);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.55);
  color: var(--green-500);
  cursor: pointer;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 6px 20px rgba(0, 61, 37, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.4s ease, transform 0.4s ease, visibility 0.4s, background 0.25s ease;
}

.back-to-top svg {
  width: 22px;
  height: 22px;
}

.back-to-top.is-visible {
  opacity: 0.65;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top.is-visible:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
}

/* 滚动到底部时停靠在 main（常见问题版块）右下角，不进入页脚 */
.back-to-top.is-docked {
  position: absolute;
  top: auto;
  bottom: 32px;
}

@media (max-width: 768px) {
  .back-to-top {
    right: 16px;
    bottom: 20px;
    width: 42px;
    height: 42px;
  }
  .back-to-top svg {
    width: 19px;
    height: 19px;
  }
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}