:root {
  --ink: #111111;
  --soft-ink: #333333;
  --muted: #767676;
  --paper: #f7f7f5;
  --white: #ffffff;
  --line: #d7d6d0;
  --gold: #a9874d;
  --sage: #718f84;
  --mist: #e8ecea;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;

  max-width: 100%;
  height: auto;
}

/* ---- Hero ---- */
.hero {
  min-height: 86svh;
  position: relative;
  overflow: hidden;
  display: grid;
  align-items: center;
  padding: 96px clamp(24px, 6vw, 92px) 56px;
  background:
    linear-gradient(90deg, rgba(247, 247, 245, 0.96) 0%, rgba(247, 247, 245, 0.82) 34%, rgba(247, 247, 245, 0.2) 68%),
    url("/static/shenyan/images/shenyan-packaging-hero.jpg") center / cover no-repeat;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 88px;
  background: linear-gradient(180deg, rgba(247, 247, 245, 0), var(--paper));
  pointer-events: none;
}

.site-nav {
  position: absolute;
  inset: 0 0 auto;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px clamp(24px, 6vw, 92px);
}

.brand-mark {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  font-weight: 700;
}

.brand-mark span {
  font-size: 0.86rem;
}

.brand-mark strong {
  font-size: 1.28rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 80px;
  color: var(--soft-ink);
  font-size: 0.92rem;
}

.hero-copy {
  position: relative;
  z-index: 2;
  max-width: 690px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--sage);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(3rem, 5.7vw, 5.7rem);
  line-height: 0.96;
  font-weight: 800;
}

.hero h1 span {
  display: block;

  margin-top: 16px;
  font-size: clamp(1.55rem, 2.3vw, 2.3rem);
  font-weight: 700;
}

.hero-lede {
  max-width: 590px;
  margin: 28px 0 0;
  color: var(--soft-ink);
  font-size: 1.1rem;
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  font-weight: 700;
  transition: opacity 0.2s;
}

.primary-link:hover,
.secondary-link:hover,
.primary-link.dark:hover {
  opacity: 0.85;
}

.primary-link {
  background: var(--ink);
  color: var(--white);
}

.secondary-link {
  background: rgba(255, 255, 255, 0.46);
}

.primary-link.dark {
  background: var(--white);
  color: var(--ink);
  border-color: var(--white);
}

.hero-meta {
  position: absolute;
  right: clamp(24px, 6vw, 92px);
  bottom: 34px;
  z-index: 2;
  display: grid;
  gap: 6px;
  color: var(--soft-ink);
  text-align: right;
  font-size: 0.8rem;
}

.hero-meta strong {
  color: var(--ink);
}

/* ---- Signal Band ---- */
.signal-band {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--gold);
  border-block: 1px solid var(--line);
}

.signal-band span {
  min-height: 72px;
  display: grid;
  place-items: center;
  background: var(--paper);
  color: var(--soft-ink);
  font-size: 0.75rem;
  font-weight: 700;
  text-align: center;
}

/* ---- Section ---- */
.section {
  padding: 96px clamp(24px, 6vw, 92px);
}

.section-heading {
  max-width: 850px;
  margin-bottom: 44px;
}

.section-heading.compact {
  max-width: 620px;
}

.section-heading h2,
.routine-copy h2,
.contact-section h2 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.18;
}

/* ---- System Layout ---- */
.system-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(420px, 1.22fr);
  gap: 42px;
  align-items: stretch;
}

.system-copy {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 36px;
  padding: 8px 0;
}

.system-copy p,
.contact-section p {
  margin: 0;
  color: var(--soft-ink);
  font-size: 1.02rem;
  line-height: 1.9;
}

.spec-list {
  margin: 0;
  border-top: 1px solid var(--line);
}

.spec-list div {
  display: grid;
  grid-template-columns: 112px 1fr;
  gap: 18px;
  padding: 18px 0;
}

.spec-list dt {
  color: var(--muted);
}

.spec-list dd {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
}

.feature-image,
.routine-media,
.gallery-item {
  margin: 0;
  overflow: hidden;
  border-radius: 8px;
  background: var(--mist);
}

.feature-image img,
.routine-media img,
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---- Science (Feature Grid) ---- */
.science-section {
  background: var(--white);
}

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

.feature-card {
  min-height: 260px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #ffffff, #f3f5f4);
}

.feature-card span {
  color: var(--gold);
  font-weight: 800;
  font-size: 1.1rem;
}

.feature-card h3 {
  margin: 52px 0 14px;
  font-size: 1.35rem;
}

.feature-card p {
  margin: 0;
  color: var(--soft-ink);
  line-height: 1.8;
}

/* ---- Routine ---- */
.routine-section {
  display: grid;
  grid-template-columns: minmax(420px, 1.1fr) minmax(320px, 0.9fr);
  gap: 52px;
  align-items: center;
  background:
    linear-gradient(90deg, rgba(113, 143, 132, 0.09), rgba(169, 135, 77, 0.07)),
    var(--paper);
}

.routine-list {
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: routine;
}

.routine-list li {
  counter-increment: routine;
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 24px;
  align-items: center;
  min-height: 62px;
  border-top: 1px solid var(--line);
  color: var(--soft-ink);
}

.routine-list li::before {
  content: counter(routine, decimal-leading-zero);
  color: var(--gold);
  font-weight: 800;
}

.routine-list li:last-child {
}

/* ---- Gallery ---- */
.gallery-section {
  background: var(--ink);
  color: var(--white);
}

.gallery-section .eyebrow {
  color: #b9c9c2;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.gallery-item {
  position: relative;
  aspect-ratio: 16 / 9;
}

.gallery-item figcaption {
  position: absolute;
  left: 18px;
  bottom: 18px;
  padding: 8px 12px;
  border-radius: 4px;
  background: rgba(17, 17, 17, 0.72);
  color: var(--white);
  font-size: 0.9rem;
}

/* ---- Contact ---- */
.contact-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  padding: 80px clamp(24px, 6vw, 92px);
  background: var(--gold);
  color: var(--white);
}

.contact-section > div {
  max-width: 760px;
}

.contact-section .eyebrow,
.contact-section p {
  color: rgba(255, 255, 255, 0.86);
}

/* ---- Service Page ---- */
.service-hero {
  min-height: 70svh;
  display: grid;
  align-items: center;
  padding: 136px clamp(24px, 6vw, 92px) 56px;
  background:
    linear-gradient(90deg, rgba(247, 247, 245, 0.95) 0%, rgba(247, 247, 245, 0.7) 50%, rgba(247, 247, 245, 0.2) 100%),
    url("/static/shenyan/images/shenyan-care-system.jpg") center / cover no-repeat;
  position: relative;
}

.service-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 80px;
  background: linear-gradient(180deg, rgba(247, 247, 245, 0), var(--paper));
  pointer-events: none;
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 34px;
}

.flow-step {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  text-align: center;
}

.flow-step .step-num {
  display: inline-flex;
  width: 48px;
  height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--sage);
  color: var(--white);
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.flow-step h3 {
  margin: 0 0 12px;
  font-size: 1.2rem;
}

.flow-step p {
  margin: 0;
  color: var(--soft-ink);
  line-height: 1.8;
  font-size: 0.95rem;
}

.service-cta {
  text-align: center;
  padding: 80px clamp(24px, 6vw, 92px);
  background: linear-gradient(135deg, rgba(113, 143, 132, 0.08), rgba(169, 135, 77, 0.06));
}

.service-cta h2 {
  font-size: clamp(1.8rem, 2.5vw, 2.5rem);
  margin: 0 0 12px;
}

.service-cta p {
  color: var(--soft-ink);
  margin: 0 0 30px;
}

.price-tag {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--gold);
}

.price-tag small {
  font-size: 1rem;
  font-weight: 400;
  color: var(--muted);
}

/* ---- About Page ---- */
.about-hero {
  min-height: 70svh;
  display: grid;
  align-items: center;
  padding: 136px clamp(24px, 6vw, 92px) 56px;
  background:
    linear-gradient(90deg, rgba(247, 247, 245, 0.92) 0%, rgba(247, 247, 245, 0.6) 50%, rgba(247, 247, 245, 0.15) 100%),
    url("/static/shenyan/images/shenyan-vitality-capsule.jpg") center / cover no-repeat;
  position: relative;
}

.about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 80px;
  background: linear-gradient(180deg, rgba(247, 247, 245, 0), var(--paper));
  pointer-events: none;
}

.about-content {
  max-width: 780px;
  margin: 0 auto;
}

.about-content p {
  font-size: 1.05rem;
  line-height: 2;
  color: var(--soft-ink);
  margin: 0 0 24px;
}

.about-quote {
  border-left: 3px solid var(--gold);
  padding: 20px 28px;
  margin: 32px 0;
  background: var(--white);
  border-radius: 0 8px 8px 0;
}

.about-quote p {
  font-style: italic;
  font-size: 1.1rem;
  color: var(--ink);
  margin: 0 0 8px;
}

.about-quote cite {
  color: var(--muted);
  font-size: 0.9rem;
}

.about-content h2 {
  font-size: 1.6rem;
  margin: 36px 0 16px;
  color: var(--ink);
  border-bottom: 2px solid var(--gold);
  padding-bottom: 8px;
  display: inline-block;
}

/* ---- FAQ Page ---- */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  padding: 20px 0;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 700;
  font-size: 1.05rem;
  user-select: none;
}

.faq-question .faq-toggle {
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  transition: transform 0.25s;
  color: var(--gold);
  font-weight: 400;
  font-size: 1.2rem;
}

.faq-item.open .faq-question .faq-toggle {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0;
  color: var(--soft-ink);
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 16px 0 4px;
}

/* ---- Page Sub Nav ---- */
.sub-nav {
  position: absolute;
  inset: 0 0 auto;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px clamp(24px, 6vw, 92px);
}

.sub-nav .nav-links a {
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}

.sub-nav .nav-links a:hover {
  border-bottom-color: var(--gold);
}

/* ---- Page Footer ---- */
.page-footer {
  padding: 48px clamp(24px, 6vw, 92px);
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  font-size: 0.85rem;
  color: var(--muted);
}

.page-footer .brand-mark {
  font-size: 0.85rem;
}

/* ---- Back to Top ---- */
.back-top {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--gold);
  font-weight: 700;
}

/* ---- Responsive ---- */
@media (max-width: 980px) {
  .hero, .service-hero, .about-hero {
    padding-top: 118px;
  }
  .hero {
    min-height: 84svh;
    background:
      linear-gradient(180deg, rgba(247, 247, 245, 0.98) 0%, rgba(247, 247, 245, 0.9) 48%, rgba(247, 247, 245, 0.28) 100%),
      url("/static/shenyan/images/shenyan-packaging-hero.jpg") center bottom / cover no-repeat;
  }
  .site-nav, .sub-nav {
    align-items: flex-start;
  }
  .nav-links {
    display: none;
  }
  .hero-meta {
    position: relative;
    right: auto;
    bottom: auto;
    margin-top: 40px;
    text-align: left;
  }
  .signal-band,
  .feature-grid,
  .gallery-grid,
  .flow-steps {
    grid-template-columns: 1fr 1fr;
  }
  .system-layout,
  .routine-section {
    grid-template-columns: 1fr 1fr;
  }
  .contact-section {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 640px) {
  .hero, .service-hero, .about-hero {
    padding: 104px 20px 42px;
  }
  .site-nav, .sub-nav {
    padding: 22px 20px;
  }
  .hero-lede {
    font-size: 1rem;
    line-height: 1.75;
  }
  .hero-actions {
    width: 100%;
  }
  .primary-link,
  .secondary-link {
    flex: 1 1 160px;
  }
  .signal-band,
  .feature-grid,
  .gallery-grid,
  .flow-steps {
    grid-template-columns: 1fr 1fr;
  }
  .signal-band span {
    min-height: 56px;
  }
  .section {
    padding: 68px 20px;
  }
  .spec-list div {
    grid-template-columns: 1fr 1fr;
    gap: 6px;
  }
  .feature-card {
    min-height: 220px;
    padding: 72px 24px 24px;
  }
  .feature-card h3 {
    margin-top: 38px;
  }
  .contact-section {
    padding: 64px 20px;
  }
  .page-footer {
    flex-direction: column;
    text-align: center;
  }
  .flow-step {
    padding: 72px 24px 24px;
  }
}


/* ===== 下拉菜单（保持原有 nav 样式） ===== */
.nav-dropdown {
  position: relative;
  display: inline-block;
}
.nav-dropdown > a {
  display: inline-block;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
  cursor: pointer;
}
.nav-dropdown > a:hover {
  border-bottom-color: var(--gold);
}
.nav-dropdown .dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 0;
  min-width: 140px;
  opacity: 0;
  visibility: hidden;
  transition: all .2s ease;
  box-shadow: 0 4px 20px rgba(0,0,0,.06);
}
.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
}
.nav-dropdown .dropdown-menu a {
  display: block;

  padding: 10px 20px;
  font-size: .85rem;
  color: var(--soft-ink);
  text-decoration: none;
  white-space: nowrap;
  transition: background .15s;
}
.nav-dropdown .dropdown-menu a:hover {
  background: var(--paper);
  color: var(--gold);
}

/* 触摸设备：点击展开下拉 */
@media (hover: none) {
  .nav-dropdown .dropdown-menu {
    opacity: 0 !important;
    visibility: hidden !important;
  }
  .nav-dropdown.open .dropdown-menu {
    opacity: 1 !important;
    visibility: visible !important;
  }
}

/* 导航内联底色 */
.site-nav .nav-links {
  border: 1px solid var(--gold);
  
  background: rgba(255,255,255,0.3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: 4px 24px;
  border-radius: 6px;
}


/* 导航悬停反馈 */
.site-nav .nav-links > a,
.site-nav .nav-dropdown > a {
  padding: 4px 16px;
  border-radius: 4px;
  transition: all 0.2s;
}
.site-nav .nav-links > a:hover,
.site-nav .nav-dropdown > a:hover {
  background: var(--gold);
  color: #fff;
}


/* ===== 移动端导航 ===== */

/* ===== 移动端导航（触屏优化） ===== */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  background: rgba(255,255,255,0.85);
  border: none;
  padding: 12px;
  margin-left: auto;
  z-index: 30;
  border-radius: 6px;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  min-width: 44px;
  min-height: 44px;
}
.mobile-menu-btn span {
  display: block;

  width: 22px;
  height: 2px;
  background: var(--ink);
  transition: .3s;
  border-radius: 2px;
}
.mobile-menu-btn.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-btn.open span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 768px) {
  .site-nav {
    padding: 12px 16px;
  }
  .site-nav .brand-mark {
    padding: 4px 0;
  }

  /* 遮罩层 */
  .site-nav .nav-links {
    display: block;

    position: fixed;
    top: 8px;
    right: 0;
    
    transform: translateX(100%);
    width: 260px;
    
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 72px 24px 24px;
    z-index: 20;
    border: none;
    border-radius: 16px 0 0 16px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: -4px 0 24px rgba(0,0,0,0.08);
    gap: 0;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .site-nav .nav-links.open {
    transform: translateX(0);
  }

  /* 半透明背景遮罩 */
  .nav-overlay {
    z-index: 15;
    display: none;
    position: fixed;
    right: 0;
    inset: 0;
    background: rgba(0,0,0,0.3);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 15;
  }
  .nav-overlay.open {
    display: block;

  }

  /* 菜单项 - 加大触控区域 */
  .site-nav .nav-links > a,
  .site-nav .nav-dropdown > a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    font-size: 1.05rem;
    border-radius: 8px;
    min-height: 48px;
    margin: 2px 0;
    transition: background 0.15s;
  }

  /* 下拉箭头指示 */
  .site-nav .nav-dropdown > a::after {
    content: '▸';
    display: inline-block;
    color: var(--muted);
    font-size: 0.8rem;
    transition: transform 0.2s;
  }
  .nav-dropdown.open > a::after {
    transform: rotate(90deg);
  }

  /* 触控高亮 */
  /* 隐藏桌面分隔线 */
  .site-nav .nav-links > a::after {
    display: none;
  }

  .nav-dropdown {
    display: block;
    width: 100%;
  }
  .nav-dropdown .dropdown-menu {
    position: static;
    transform: none;
    opacity: 1 !important;
    visibility: visible !important;
    box-shadow: none;
    border: none;
    padding: 0;
    display: none;
    background: transparent;
  }
  .nav-dropdown.open .dropdown-menu {
    display: block;

  }
  .nav-dropdown .dropdown-menu a {
    display: block;

    padding: 12px 24px;
    font-size: 0.95rem;
    color: var(--muted);
    border-radius: 6px;
    margin: 2px 0;
    min-height: 44px;
    transition: background 0.15s;
  }
  .nav-dropdown .dropdown-menu a:active {
    background: var(--paper);
    color: var(--gold);
  }

  .mobile-menu-btn {
    display: flex;
  }
}


/* ===== 导航列分隔线 ===== */
.site-nav .nav-links > a:not(:last-child)::after,
.site-nav .nav-dropdown:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -40px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 14px;
  background: var(--gold);
  pointer-events: none;
}
.site-nav .nav-links > a,
.site-nav .nav-dropdown > a {
  position: relative;
}

/* 移动端：金色圆角横线分隔 */
@media (max-width: 768px) {
  .site-nav .nav-links > a:not(:last-child)::after,
  .site-nav .nav-dropdown:not(:last-child)::after {
    right: auto;
    top: auto;
    bottom: 0;
    left: 10%;
    transform: none;
    width: 80%;
    height: 1px;
    background: var(--gold);
    border-radius: 2px;
  }
}

/* 遮罩层 - 桌面隐藏，移动端固定 */
.nav-overlay {
  display: none;
}

/* ===== 品牌信息条 ===== */
.brand-info-section {
  background: #fff;
  border-top: 1px solid var(--line);
  padding: 48px clamp(24px, 6vw, 92px);
}
.bi-container {
  max-width: 1200px;
  margin: 0 auto;
}
.bi-stat {
  text-align: center;
  min-width: 140px;
}
.bi-num {
  font-size: 1.6rem;
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--gold);
  line-height: 1.2;
  margin-bottom: 4px;
}
.bi-label {
  font-size: .85rem;
  color: var(--muted);
  letter-spacing: .04em;
}

/* ===== 统一页脚 ===== */
.page-footer {
  background: var(--paper);
  padding: 48px clamp(24px, 6vw, 92px) 24px;
  border-top: 1px solid var(--line);
}
.footer-main {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
  gap: 32px;
}
.footer-brand-block .brand-mark {
  font-size: 1rem;
  margin-bottom: 12px;
  display: inline-flex;
}
.footer-desc {
  font-size: .85rem;
  color: var(--muted);
  margin: 12px 0 0;
  line-height: 1.6;
}
.footer-links-block h4 {
  font-size: .85rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 16px;
  letter-spacing: .04em;
}
.footer-links-block a {
  display: block;
  font-size: .85rem;
  color: var(--muted);
  text-decoration: none;
  padding: 6px 0;
  transition: color .2s;
}
.footer-links-block a:hover {
  color: var(--gold);
}
.footer-qr-block h4 {
  font-size: .85rem;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 16px;
  letter-spacing: .04em;
}
.footer-qrs {
  display: flex;
  gap: 24px;
}
.footer-qr {
  text-align: center;
}
.qr-placeholder {
  width: 80px;
  height: 80px;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 6px;
}
.footer-qr span {
  font-size: .75rem;
  color: var(--muted);
}
.footer-bottom {
  max-width: 1200px;
  margin: 32px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .8rem;
  color: var(--muted);
}
.back-top {
  color: var(--gold);
  font-weight: 700;
  text-decoration: none;
  font-size: .85rem;
}

@media (max-width: 768px) {
  .bi-stats {
    gap: 24px;
  }
  .bi-stat {
    min-width: 100px;
  }
  .bi-num {
  font-size: 1.6rem;
    font-size: 1.6rem;
  }
  .footer-main {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .footer-brand-block {
    grid-column: 1 / -1;
  }
  .footer-qr-block {
    grid-column: 1 / -1;
  }
  .footer-qrs {
    justify-content: center;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

.about-content ul {
  list-style: disc;
  padding-left: 24px;
  margin: 20px 0;
  line-height: 2;
  color: var(--soft-ink);
  font-size: 1.02rem;
}
.about-content ul li {
  margin-bottom: 8px;
}



/* ===== 参研动态 - 2列布局 ===== */
.news-list {
  max-width: 960px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.news-card-link {
  text-decoration: none;
  display: block;
  transition: transform .2s;
}
.news-card-link:hover {
  transform: translateY(-2px);
}
.news-card-h {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  height: 100%;
  transition: box-shadow .2s;
}
.news-card-link:hover .news-card-h {
  box-shadow: 0 4px 20px rgba(0,0,0,.06);
}
.news-card-img {
  flex: 0 0 200px;
  overflow: hidden;
}
.news-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.news-card-body {
  flex: 1;
  padding: 20px;
  display: flex;
  flex-direction: column;
}
.news-date {
  font-size: .8rem;
  color: var(--gold);
  font-weight: 700;
  letter-spacing: .04em;
  margin-bottom: 6px;
}
.news-card-body h3 {
  font-size: 1.05rem;
  margin: 0 0 8px;
  color: var(--ink);
  line-height: 1.4;
}
.news-card-body p {
  font-size: .88rem;
  line-height: 1.6;
  color: var(--muted);
  margin: 0 0 auto;
  flex: 1;
}
.news-read-more {
  font-size: .85rem;
  color: var(--gold);
  font-weight: 700;
  margin-top: 12px;
  display: block;
}

/* ===== 文章详情 ===== */
.article-detail {
  max-width: 760px;
  margin: 0 auto;
}
.article-cover {
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 32px;
}
.article-cover img {
  width: 100%;
  display: block;
}
.article-body {
  font-size: 1.05rem;
  line-height: 2;
  color: var(--soft-ink);
}
.article-body p {
  margin: 0 0 20px;
}
.article-body ul, .article-body ol {
  padding-left: 24px;
  margin: 16px 0 24px;
}
.article-body li {
  margin-bottom: 8px;
}
.article-footer {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

@media (max-width: 640px) {
  .news-list {
    grid-template-columns: 1fr 1fr;
  }
  .news-card-img {
    flex: 0 0 160px;
  }
}

/* ===== 品牌实力 ===== */
.bi-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 32px 24px;
  justify-items: center;
}