/* ============================================================
   万象国际pg — 瑞士国际主义网格设计系统
   Swiss Grid / Editorial Rationalism
   ============================================================ */

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

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

body {
  margin: 0;
  font-family: "Helvetica Neue", Helvetica, Arial, "Noto Sans SC",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #111111;
  background-color: #f2f0ec;
  background-image: linear-gradient(
    to bottom,
    rgba(17, 17, 17, 0.032) 1px,
    transparent 1px
  );
  background-size: 100% 80px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: #111111;
}

p {
  margin: 0;
}

a {
  color: inherit;
}

::selection {
  background: #e2231a;
  color: #ffffff;
}

:focus-visible {
  outline: 2px solid #e2231a;
  outline-offset: 3px;
}

/* ------------------------------------------------------------
   布局基元
   ------------------------------------------------------------ */

.container {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding-left: clamp(20px, 4vw, 48px);
  padding-right: clamp(20px, 4vw, 48px);
}

.section {
  padding-top: clamp(56px, 7vw, 104px);
  padding-bottom: clamp(56px, 7vw, 104px);
  position: relative;
}

.section + .section {
  border-top: 1px solid rgba(17, 17, 17, 0.12);
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: #e2231a;
  margin-bottom: 22px;
  font-feature-settings: "tnum" 1;
}

.section-label::before {
  content: "";
  width: 32px;
  height: 2px;
  background: #e2231a;
  flex: none;
}

.section-title {
  font-size: clamp(1.85rem, 3.6vw, 3rem);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: -0.032em;
  max-width: 24ch;
  margin: 0 0 22px;
}

.section-desc {
  font-size: 15.5px;
  line-height: 1.9;
  color: #55524c;
  max-width: 64ch;
  margin: 0 0 clamp(32px, 4vw, 56px);
}

/* ------------------------------------------------------------
   顶部导航
   ------------------------------------------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  background: rgba(242, 240, 236, 0.93);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #111111;
}

.header-inner {
  width: 100%;
  max-width: 1320px;
  margin: 0 auto;
  padding-left: clamp(20px, 4vw, 48px);
  padding-right: clamp(20px, 4vw, 48px);
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  position: relative;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #111111;
  flex: none;
}

.logo-icon {
  width: 26px;
  height: 26px;
  background: #e2231a;
  display: block;
  position: relative;
  flex: none;
}

.logo-icon::after {
  content: "";
  position: absolute;
  left: 7px;
  right: 7px;
  top: 50%;
  height: 2px;
  margin-top: -1px;
  background: #ffffff;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.6vw, 42px);
  margin-left: auto;
}

.main-nav a {
  position: relative;
  display: inline-block;
  padding: 8px 0;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-decoration: none;
  color: #111111;
  transition: color 0.25s ease;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 100%;
  height: 1px;
  background: #e2231a;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.main-nav a:hover {
  color: #e2231a;
}

.main-nav a:hover::after {
  transform: scaleX(1);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  background: #111111;
  color: #ffffff;
  border: 1px solid #111111;
  border-radius: 0;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-decoration: none;
  transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
  flex: none;
}

.nav-cta:hover {
  background: #e2231a;
  border-color: #e2231a;
  color: #ffffff;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid #111111;
  border-radius: 0;
  cursor: pointer;
  position: relative;
  flex: none;
}

.menu-toggle::before,
.menu-toggle::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  height: 1.5px;
  background: #111111;
  transition: transform 0.25s ease;
}

.menu-toggle::before {
  top: 16px;
}

.menu-toggle::after {
  bottom: 16px;
}

/* ------------------------------------------------------------
   按钮
   ------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 32px;
  border: 1px solid #111111;
  border-radius: 0;
  font-family: inherit;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.28s ease, color 0.28s ease,
    border-color 0.28s ease, transform 0.28s ease;
}

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

.btn-primary {
  background: #e2231a;
  border-color: #e2231a;
  color: #ffffff;
}

.btn-primary:hover {
  background: #111111;
  border-color: #111111;
  color: #ffffff;
}

.btn-outline {
  background: transparent;
  border-color: #111111;
  color: #111111;
}

.btn-outline:hover {
  background: #111111;
  border-color: #111111;
  color: #ffffff;
}

/* ------------------------------------------------------------
   首屏
   ------------------------------------------------------------ */

.hero {
  padding-top: clamp(48px, 7vw, 110px);
  padding-bottom: clamp(48px, 6vw, 96px);
  position: relative;
  border-bottom: 1px solid rgba(17, 17, 17, 0.14);
}

.hero-content {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.98fr);
  gap: clamp(32px, 5.5vw, 88px);
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: #e2231a;
  margin-bottom: 20px;
  font-feature-settings: "tnum" 1;
}

.hero-eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  background: #e2231a;
  flex: none;
}

.hero h1 {
  font-size: clamp(2.5rem, 5.6vw, 4.6rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.04em;
  color: #111111;
  margin: 0;
}

.hero h1 .text-accent {
  color: #e2231a;
}

.hero p {
  margin-top: 26px;
  font-size: 16px;
  line-height: 1.9;
  color: #55524c;
  max-width: 46ch;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.hero-image {
  position: relative;
  width: 100%;
  aspect-ratio: 5 / 6;
  background: #e6e3dc;
  border: 1px solid #111111;
  overflow: hidden;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.hero-image:hover img {
  transform: scale(1.03);
}

.hero-image::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: #e2231a;
  z-index: 2;
}

.hero-image::after {
  content: "";
  position: absolute;
  right: 20px;
  bottom: 20px;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.65);
  z-index: 2;
  pointer-events: none;
}

/* ------------------------------------------------------------
   卡片栅格
   ------------------------------------------------------------ */

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: rgba(17, 17, 17, 0.16);
  border: 1px solid rgba(17, 17, 17, 0.16);
}

.category-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: #fbfaf7;
  padding: clamp(26px, 3vw, 40px);
  transition: background 0.3s ease;
  overflow: hidden;
}

.category-card::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 3px;
  background: #e2231a;
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.category-card:hover {
  background: #ffffff;
}

.category-card:hover::after {
  transform: scaleX(1);
}

.category-card h3 {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.35;
}

.category-card p {
  font-size: 14px;
  line-height: 1.85;
  color: #55524c;
}

.card-icon {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  background: #111111;
  color: #ffffff;
  font-size: 17px;
  font-weight: 700;
  line-height: 1;
  flex: none;
  transition: background 0.3s ease;
}

.category-card:hover .card-icon {
  background: #e2231a;
}

.card-link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-decoration: none;
  color: #e2231a;
  padding-top: 8px;
}

.card-link::after {
  content: "→";
  transition: transform 0.3s ease;
}

.card-link:hover::after {
  transform: translateX(5px);
}

/* ------------------------------------------------------------
   特性区块
   ------------------------------------------------------------ */

.feature-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 80px);
  align-items: start;
}

.feature-block:nth-child(even) .feature-image {
  order: 2;
}

.feature-image {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: #e6e3dc;
  border: 1px solid #111111;
  overflow: hidden;
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.feature-image:hover img {
  transform: scale(1.04);
}

.feature-text h3 {
  font-size: clamp(1.4rem, 2.4vw, 2rem);
  letter-spacing: -0.028em;
  line-height: 1.15;
  margin-bottom: 18px;
}

.feature-text p {
  font-size: 15px;
  line-height: 1.9;
  color: #55524c;
}

.feature-list {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid rgba(17, 17, 17, 0.16);
}

.feature-list li {
  position: relative;
  border-bottom: 1px solid rgba(17, 17, 17, 0.16);
  padding: 15px 0 15px 26px;
  font-size: 14.5px;
  line-height: 1.7;
  color: #2a2823;
  transition: color 0.25s ease, padding-left 0.3s ease;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  background: #e2231a;
}

.feature-list li:hover {
  color: #111111;
  padding-left: 32px;
}

/* ------------------------------------------------------------
   数据条
   ------------------------------------------------------------ */

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid #111111;
  border-bottom: 1px solid #111111;
}

.stat-item {
  padding: clamp(28px, 3.4vw, 46px) clamp(16px, 2vw, 28px);
  border-left: 1px solid rgba(17, 17, 17, 0.16);
}

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

.stat-number {
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.045em;
  color: #111111;
  font-feature-settings: "tnum" 1;
  font-variant-numeric: tabular-nums;
}

.stat-number .text-accent {
  color: #e2231a;
}

.stat-label {
  margin-top: 14px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: #6b6862;
}

/* ------------------------------------------------------------
   内容墙
   ------------------------------------------------------------ */

.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1px;
  background: rgba(17, 17, 17, 0.16);
  border: 1px solid rgba(17, 17, 17, 0.16);
}

.content-wall-item {
  background: #fbfaf7;
  padding: clamp(24px, 3vw, 38px);
  position: relative;
  transition: background 0.3s ease;
  display: flex;
  flex-direction: column;
}

.content-wall-item::before {
  content: "";
  position: absolute;
  left: clamp(24px, 3vw, 38px);
  top: 0;
  width: 0;
  height: 3px;
  background: #e2231a;
  transition: width 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

.content-wall-item:hover {
  background: #ffffff;
}

.content-wall-item:hover::before {
  width: 42px;
}

.content-wall-body h3 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.018em;
  line-height: 1.4;
  margin-bottom: 12px;
}

.content-wall-body p {
  font-size: 14px;
  line-height: 1.85;
  color: #55524c;
}

.content-wall-body .card-link {
  margin-top: 20px;
}

/* ------------------------------------------------------------
   问答
   ------------------------------------------------------------ */

.faq-list {
  border-top: 1px solid #111111;
  max-width: 980px;
}

.faq-item {
  border-bottom: 1px solid rgba(17, 17, 17, 0.16);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0;
  font-size: 16.5px;
  font-weight: 600;
  letter-spacing: -0.012em;
  color: #111111;
  cursor: pointer;
  list-style: none;
  transition: color 0.25s ease;
}

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

.faq-question::after {
  content: "+";
  flex: none;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(17, 17, 17, 0.4);
  font-size: 15px;
  font-weight: 400;
  line-height: 1;
  color: #111111;
  transition: background 0.25s ease, color 0.25s ease,
    border-color 0.25s ease, transform 0.25s ease;
}

.faq-item:hover .faq-question {
  color: #e2231a;
}

.faq-item:hover .faq-question::after {
  background: #e2231a;
  border-color: #e2231a;
  color: #ffffff;
}

.faq-answer {
  padding: 0 0 26px;
  max-width: 74ch;
  font-size: 14.5px;
  line-height: 1.95;
  color: #55524c;
}

.faq-item[open] .faq-question::after {
  content: "−";
  background: #111111;
  border-color: #111111;
  color: #ffffff;
}

/* ------------------------------------------------------------
   横幅
   ------------------------------------------------------------ */

.cta-banner {
  background: #e2231a;
  color: #ffffff;
  padding-top: clamp(48px, 6vw, 88px);
  padding-bottom: clamp(48px, 6vw, 88px);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: #111111;
}

.cta-banner h2 {
  color: #ffffff;
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  line-height: 1.05;
  letter-spacing: -0.035em;
  max-width: 22ch;
}

.cta-banner p {
  margin-top: 20px;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.86);
}

.cta-banner .btn {
  margin-top: 34px;
}

.cta-banner .btn-primary {
  background: #ffffff;
  border-color: #ffffff;
  color: #e2231a;
}

.cta-banner .btn-primary:hover {
  background: #111111;
  border-color: #111111;
  color: #ffffff;
}

.cta-banner .btn-outline {
  border-color: rgba(255, 255, 255, 0.8);
  color: #ffffff;
}

.cta-banner .btn-outline:hover {
  background: #ffffff;
  border-color: #ffffff;
  color: #e2231a;
}

/* ------------------------------------------------------------
   页脚
   ------------------------------------------------------------ */

.site-footer {
  background: #ebe8e2;
  border-top: 1px solid #111111;
  padding-top: clamp(48px, 6vw, 82px);
  padding-bottom: 28px;
  color: #111111;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.7fr 1fr 1fr 1fr;
  gap: clamp(28px, 4vw, 56px);
}

.footer-brand .logo {
  margin-bottom: 20px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.9;
  color: #55524c;
  max-width: 36ch;
}

.footer-col h4 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #6b6862;
  margin: 0 0 20px;
}

.footer-col a {
  display: block;
  padding: 7px 0;
  font-size: 14px;
  text-decoration: none;
  color: #111111;
  transition: color 0.25s ease, transform 0.25s ease;
}

.footer-col a:hover {
  color: #e2231a;
  transform: translateX(4px);
}

.footer-bottom {
  margin-top: clamp(40px, 5vw, 68px);
  padding-top: 22px;
  border-top: 1px solid rgba(17, 17, 17, 0.18);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #6b6862;
}

.footer-bottom a {
  text-decoration: none;
  color: #6b6862;
  transition: color 0.25s ease;
}

.footer-bottom a:hover {
  color: #e2231a;
}

/* ------------------------------------------------------------
   文本工具
   ------------------------------------------------------------ */

.text-accent {
  color: #e2231a;
}

.text-center {
  text-align: center;
}

.text-center .section-title,
.text-center .section-desc,
.text-center .cta-banner h2,
.text-center .cta-banner p {
  margin-left: auto;
  margin-right: auto;
}

.seo-description {
  font-size: 12.5px;
  line-height: 2;
  color: #6b6862;
  max-width: 96ch;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid rgba(17, 17, 17, 0.12);
}

.mt-0 {
  margin-top: 0 !important;
}

.mb-0 {
  margin-bottom: 0 !important;
}

/* ------------------------------------------------------------
   响应式 — 平板
   ------------------------------------------------------------ */

@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .hero-image {
    aspect-ratio: 16 / 10;
  }

  .cards-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .feature-block:nth-child(even) .feature-image {
    order: 0;
  }

  .stats-bar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stat-item:nth-child(odd) {
    border-left: 0;
    padding-left: 0;
  }

  .stat-item:nth-child(n + 3) {
    border-top: 1px solid rgba(17, 17, 17, 0.16);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    row-gap: 40px;
  }
}

/* ------------------------------------------------------------
   响应式 — 手机
   ------------------------------------------------------------ */

@media (max-width: 860px) {
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-left: 0;
    padding: 6px clamp(20px, 4vw, 48px) 26px;
    background: #f2f0ec;
    border-bottom: 1px solid #111111;
  }

  .site-header.nav-open .main-nav,
  .site-header.is-open .main-nav,
  .site-header.menu-open .main-nav {
    display: flex;
  }

  .main-nav a {
    padding: 16px 0;
    font-size: 15px;
    border-bottom: 1px solid rgba(17, 17, 17, 0.12);
  }

  .main-nav a::after {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .nav-cta {
    display: none;
  }

  .header-inner {
    min-height: 68px;
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 40px;
  }

  .hero h1 {
    font-size: clamp(2rem, 8.6vw, 2.8rem);
  }

  .hero p {
    font-size: 15px;
  }

  .hero-buttons {
    gap: 10px;
    margin-top: 30px;
  }

  .btn {
    flex: 1 1 100%;
    padding: 16px 22px;
  }

  .hero-image {
    aspect-ratio: 4 / 3;
  }

  .hero-image::after {
    display: none;
  }

  .cards-grid,
  .content-wall {
    grid-template-columns: 1fr;
  }

  .stats-bar {
    grid-template-columns: 1fr;
  }

  .stat-item {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid rgba(17, 17, 17, 0.16);
  }

  .stat-item:first-child {
    border-top: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .faq-question {
    font-size: 15px;
    gap: 16px;
  }
}

/* ------------------------------------------------------------
   动效降级
   ------------------------------------------------------------ */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}