/* ========================================
   MRDS 每日大赛 — Dreamweaver 定制设计系统
   视觉语言：·古棋新赛· 纸张与棋盘
   ======================================== */

/* 基础重置 */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: #FAF6EF;
  color: #2C3538;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: #C84032;
  color: #FAF6EF;
}

/* 自定义滚动条 */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: #F1EAE0; }
::-webkit-scrollbar-thumb { background: #C84032; border-radius: 6px; border: 2px solid #F1EAE0; }
::-webkit-scrollbar-thumb:hover { background: #A83428; }

/* ========================================
   核心布局 — 必须居中
   ======================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section:nth-child(even) {
  background: #F1EAE0;
}

/* 棋盘格分界线 — 每段一节 */
.section::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(
    -45deg,
    #C84032 25%,
    transparent 25%,
    transparent 50%,
    #C84032 50%,
    #C84032 75%,
    transparent 75%
  );
  background-size: 16px 16px;
  opacity: 0.18;
  pointer-events: none;
}

/* ========================================
   导航 — 固定顶部
   ======================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(250, 246, 239, 0.88);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid rgba(44, 53, 56, 0.08);
  transition: box-shadow 0.3s ease;
}

.site-header.scrolled {
  box-shadow: 0 4px 24px rgba(44, 53, 56, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.35rem;
  text-decoration: none;
  color: #2C3538;
  letter-spacing: -0.02em;
  transition: opacity 0.2s;
}

.logo:hover {
  opacity: 0.88;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: #C84032;
  color: #FAF6EF;
  font-weight: 900;
  box-shadow: 3px 3px 0 rgba(200, 64, 50, 0.35);
  transform: rotate(-4deg);
  user-select: none;
}

.logo-icon::before {
  content: '赛';
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: #2C3538;
  transition: color 0.25s;
  position: relative;
  letter-spacing: 0.02em;
  padding: 4px 2px;
}

.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: #C84032;
  transition: width 0.35s cubic-bezier(0.22, 1, 0.36, 1);
}

.main-nav a:not(.nav-cta):hover {
  color: #C84032;
}

.main-nav a:not(.nav-cta):hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 26px;
  border-radius: 6px;
  color: #FAF6EF !important;
  font-weight: 700;
  background: #C84032;
  box-shadow: 3px 3px 0 rgba(200, 64, 50, 0.3);
  transition: transform 0.25s, box-shadow 0.25s;
  letter-spacing: 0.04em;
}

.nav-cta::after {
  display: none;
}

.nav-cta:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 rgba(200, 64, 50, 0.35);
  color: #FFFFFF !important;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(44, 53, 56, 0.15);
  border-radius: 8px;
  background: transparent;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 0;
  transition: border-color 0.2s;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: #2C3538;
  border-radius: 2px;
  transition: transform 0.35s, opacity 0.25s;
}

.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); background: #C84032; }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background: #C84032; }

/* ========================================
   首页 Hero
   ======================================== */
.hero {
  min-height: 88vh;
  display: flex;
  align-items: center;
  background-color: #FAF6EF;
  background-image:
    linear-gradient(rgba(250, 246, 239, 0.88), rgba(250, 246, 239, 0.88)),
    linear-gradient(rgba(44, 53, 56, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44, 53, 56, 0.06) 1px, transparent 1px);
  background-size: auto, 32px 32px, 32px 32px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '赛';
  position: absolute;
  right: 2%;
  top: 50%;
  transform: translateY(-55%);
  font-size: min(34rem, 36vw);
  font-weight: 900;
  line-height: 1;
  color: rgba(200, 64, 50, 0.055);
  pointer-events: none;
  z-index: 0;
  font-family: 'Songti SC', 'SimSun', serif;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 18px;
  background: repeating-linear-gradient(
    -45deg,
    #C84032,
    #C84032 10px,
    transparent 10px,
    transparent 16px
  );
  opacity: 0.15;
}

/* 棋盘浮动装饰 */
.hero .decoration-pawn {
  position: absolute;
  width: 80px;
  height: 80px;
  border: 3px solid rgba(29, 137, 131, 0.2);
  border-radius: 50% 50% 12px 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 900;
  color: rgba(29, 137, 131, 0.3);
  z-index: 0;
}

.hero .decoration-pawn.pawn-left {
  left: 3%;
  bottom: 18%;
  transform: rotate(-12deg);
  animation: floatPawn 6s ease-in-out infinite;
}

.hero .decoration-pawn.pawn-right {
  right: 8%;
  top: 12%;
  transform: rotate(8deg);
  animation: floatPawn 7.5s ease-in-out infinite reverse;
  width: 56px;
  height: 56px;
  font-size: 1rem;
}

@keyframes floatPawn {
  0%, 100% { transform: translateY(0) rotate(-12deg); }
  50% { transform: translateY(-14px) rotate(3deg); }
}

.hero-content {
  max-width: 780px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 8px 20px;
  border-radius: 2px;
  margin-bottom: 24px;
  background: #1F8983;
  color: #FAF6EF;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  box-shadow: 2px 2px 0 rgba(31, 137, 131, 0.3);
  animation: fadeUp 0.7s ease both;
}

.hero h1 {
  font-size: clamp(2.4rem, 5.6vw, 3.6rem);
  line-height: 1.15;
  margin-bottom: 24px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: #2C3538;
  animation: fadeUp 0.7s ease 0.08s both;
}

.hero h1 .accent {
  color: #C84032;
  position: relative;
  white-space: nowrap;
}

.hero h1 .accent::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 100%;
  height: 8px;
  background: rgba(217, 164, 65, 0.45);
  z-index: -1;
  border-radius: 2px;
}

.hero h1 .jade {
  color: #1F8983;
}

.hero p {
  font-size: 1.08rem;
  opacity: 0.72;
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.8;
  animation: fadeUp 0.7s ease 0.16s both;
}

.hero-buttons {
  display: flex;
  gap: 18px;
  animation: fadeUp 0.7s ease 0.24s both;
  flex-wrap: wrap;
}

/* ========================================
   按钮
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 34px;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s, color 0.25s;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  position: relative;
}

.btn-primary {
  color: #FAF6EF;
  background: #C84032;
  box-shadow: 4px 4px 0 rgba(200, 64, 50, 0.25);
}

.btn-primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(200, 64, 50, 0.35);
  background: #B8372A;
}

.btn-primary:active {
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 rgba(200, 64, 50, 0.2);
}

.btn-outline {
  background: transparent;
  border: 2px solid #1F8983;
  color: #1F8983;
}

.btn-outline:hover {
  background: #1F8983;
  color: #FAF6EF;
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 rgba(31, 137, 131, 0.2);
}

/* ========================================
   标签 / 标题
   ======================================== */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 4px;
  margin-bottom: 16px;
  color: #C84032;
  text-transform: uppercase;
  border-left: 3px solid #C84032;
  padding-left: 12px;
}

.section-title {
  font-size: clamp(1.8rem, 3.6vw, 2.5rem);
  margin-bottom: 16px;
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: #2C3538;
}

.section-title .highlight {
  color: #C84032;
  position: relative;
  display: inline-block;
}

.section-title .highlight::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(217, 164, 65, 0.4);
  z-index: -1;
}

.section-desc {
  max-width: 640px;
  opacity: 0.68;
  margin-bottom: 48px;
  line-height: 1.75;
  font-size: 1.02rem;
}

/* ========================================
   卡片网格
   ======================================== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.category-card {
  border-radius: 4px;
  padding: 32px 28px;
  background: #FEFCF8;
  border: 1px solid rgba(44, 53, 56, 0.08);
  box-shadow: 4px 4px 0 rgba(44, 53, 56, 0.05);
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.3s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.3s;
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #C84032, #1F8983);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

.category-card::after {
  content: '᯼';
  position: absolute;
  right: -10px;
  bottom: -18px;
  font-size: 4.5rem;
  color: rgba(44, 53, 56, 0.03);
  font-weight: 900;
  pointer-events: none;
  transform: rotate(-8deg);
}

.category-card:hover {
  transform: translateY(-6px) rotate(-0.5deg);
  box-shadow: 8px 10px 0 rgba(200, 64, 50, 0.12);
  border-color: rgba(200, 64, 50, 0.15);
}

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

.card-icon {
  width: 54px;
  height: 54px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
  background: linear-gradient(135deg, #F1EAE0, #FAF6EF);
  color: #1F8983;
  border: 1px solid rgba(31, 137, 131, 0.1);
  font-weight: 900;
}

.category-card:nth-child(2) .card-icon { color: #C84032; border-color: rgba(200, 64, 50, 0.1); }
.category-card:nth-child(3) .card-icon { color: #D9A441; border-color: rgba(217, 164, 65, 0.15); }

.category-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #2C3538;
}

.category-card p {
  font-size: 0.88rem;
  opacity: 0.6;
  line-height: 1.6;
  margin-bottom: 16px;
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: #C84032;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
}

.card-link::after {
  content: '→';
  font-size: 1.1rem;
  transition: transform 0.2s;
}

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

/* ========================================
   特性块
   ======================================== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 10px 10px 0 rgba(31, 137, 131, 0.18);
  border: 1px solid rgba(44, 53, 56, 0.08);
  position: relative;
  background: linear-gradient(135deg, #F1EAE0, #FAF6EF);
  min-height: 320px;
}

.feature-image::before {
  content: '卒';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 7rem;
  font-weight: 900;
  color: rgba(200, 64, 50, 0.08);
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.feature-text {
  position: relative;
  z-index: 1;
}

.feature-text .section-title {
  font-size: 1.7rem;
}

.feature-text .section-desc {
  margin-bottom: 28px;
}

.feature-list {
  list-style: none;
  margin-top: 8px;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  font-size: 0.96rem;
  color: rgba(44, 53, 56, 0.85);
}

.feature-list li::before {
  content: '卒';
  font-weight: 900;
  color: #FAF6EF;
  background: #C84032;
  width: 26px;
  height: 26px;
  border-radius: 5px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  flex-shrink: 0;
  box-shadow: 2px 2px 0 rgba(200, 64, 50, 0.25);
}

/* 交替布局 */
.feature-block:nth-child(even) .feature-image {
  order: 2;
}

/* ========================================
   数据条
   ======================================== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat-item {
  padding: 36px 20px;
  border-radius: 4px;
  border: 1px solid rgba(44, 53, 56, 0.08);
  background: #FEFCF8;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.stat-item::before {
  content: attr(data-index);
  position: absolute;
  top: 8px;
  right: 14px;
  font-size: 0.7rem;
  font-weight: 700;
  color: rgba(44, 53, 56, 0.25);
  letter-spacing: 0.08em;
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 32px;
  height: 4px;
  background: #D9A441;
  border-radius: 2px 2px 0 0;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 6px 6px 0 rgba(31, 137, 131, 0.12);
}

.stat-item:nth-child(2)::after { background: #C84032; }
.stat-item:nth-child(3)::after { background: #1F8983; }
.stat-item:nth-child(4)::after { background: #D9A441; }

.stat-number {
  font-size: 2.6rem;
  font-weight: 900;
  color: #C84032;
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}

.stat-item:nth-child(2) .stat-number { color: #1F8983; }
.stat-item:nth-child(3) .stat-number { color: #D9A441; }
.stat-item:nth-child(4) .stat-number { color: #2C3538; }

.stat-label {
  font-size: 0.9rem;
  opacity: 0.6;
  margin-top: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

/* ========================================
   内容墙
   ======================================== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: 4px;
  overflow: hidden;
  background: #FEFCF8;
  border: 1px solid rgba(44, 53, 56, 0.08);
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  position: relative;
}

.content-wall-item::before {
  content: '赛事';
  position: absolute;
  top: 16px;
  left: -28px;
  background: #C84032;
  color: #FAF6EF;
  font-size: 0.7rem;
  font-weight: 800;
  padding: 4px 32px;
  transform: rotate(-42deg);
  z-index: 2;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: 8px 10px 0 rgba(200, 64, 50, 0.12);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.content-wall-item:hover img {
  transform: scale(1.04);
}

.content-wall-body {
  padding: 24px;
}

.content-wall-body .date-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 800;
  color: #1F8983;
  background: rgba(31, 137, 131, 0.1);
  border-radius: 3px;
  padding: 3px 10px;
  margin-bottom: 10px;
  letter-spacing: 0.08em;
}

.content-wall-body h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #2C3538;
  line-height: 1.4;
}

.content-wall-body p {
  font-size: 0.88rem;
  opacity: 0.65;
  line-height: 1.7;
}

/* ========================================
   FAQ 常见问题
   ======================================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid rgba(44, 53, 56, 0.1);
  border-radius: 4px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: #FEFCF8;
  transition: border-color 0.3s, background 0.3s;
  box-shadow: 2px 2px 0 rgba(44, 53, 56, 0.03);
}

.faq-item:hover {
  border-color: rgba(200, 64, 50, 0.4);
}

.faq-item.open {
  border-color: #C84032;
  background: #FFFFFF;
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.98rem;
  color: #2C3538;
  letter-spacing: 0.02em;
  user-select: none;
}

.faq-item .faq-question::after {
  content: '＋';
  font-size: 1.2rem;
  color: #C84032;
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  font-weight: 400;
}

.faq-item.open .faq-question::after {
  transform: rotate(135deg);
  color: #1F8983;
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  opacity: 0;
  line-height: 1.8;
  font-size: 0.92rem;
  border-top: 1px dashed rgba(44, 53, 56, 0.1);
  margin: 0 24px 0;
  padding: 16px 0 20px;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeIn 0.3s ease forwards;
}

.faq-item .faq-answer::before {
  content: '答：';
  font-weight: 800;
  color: #1F8983;
}

/* ========================================
   CTA 横幅 — 亮红色 · 日拱一卒
   ======================================== */
.cta-banner {
  padding: 72px 40px;
  text-align: center;
  border-radius: 4px;
  background: linear-gradient(135deg, #C84032 0%, #D95D4F 60%, #E06A5C 100%);
  position: relative;
  overflow: hidden;
  color: #FAF6EF;
  box-shadow: 8px 8px 0 rgba(200, 64, 50, 0.22);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -10%;
  width: 200px;
  height: 200px;
  background: rgba(250, 246, 239, 0.06);
  border-radius: 50%;
}

.cta-banner::after {
  content: '日拱一卒 赛过昨天';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 900;
  color: rgba(250, 246, 239, 0.06);
  white-space: nowrap;
  letter-spacing: 0.05em;
  pointer-events: none;
}

.cta-banner h2 {
  color: #FAF6EF;
  font-size: clamp(1.8rem, 3vw, 2.2rem);
  margin-bottom: 14px;
  font-weight: 900;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(250, 246, 239, 0.8);
  margin-bottom: 30px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  font-size: 1rem;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #FAF6EF;
  color: #C84032;
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.12);
  font-size: 1rem;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  background: #FFFFFF;
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(0, 0, 0, 0.2);
  color: #B8372A;
}

/* ========================================
   页脚 — 浅色暖调
   ======================================== */
.site-footer {
  padding: 72px 0 32px;
  background: #F1EAE0;
  border-top: 1px solid rgba(44, 53, 56, 0.06);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #C84032, #D9A441, #1F8983, #C84032);
  background-size: 200% 100%;
  animation: shimmer 6s linear infinite;
}

@keyframes shimmer {
  0% { background-position: 0% 0; }
  100% { background-position: -200% 0; }
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 44px;
}

.footer-brand {
  font-weight: 900;
  font-size: 1.25rem;
  color: #2C3538;
}

.footer-brand .logo-icon {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.88rem;
  opacity: 0.7;
  line-height: 1.7;
  margin-top: 12px;
  max-width: 320px;
  font-weight: 400;
}

.footer-col h4 {
  font-size: 0.78rem;
  font-weight: 800;
  color: #2C3538;
  margin-bottom: 18px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  border-left: 3px solid #D9A441;
  padding-left: 10px;
}

.footer-col a {
  display: block;
  color: rgba(44, 53, 56, 0.7);
  text-decoration: none;
  font-size: 0.88rem;
  padding: 5px 0;
  transition: color 0.2s, padding-left 0.25s;
}

.footer-col a:hover {
  color: #C84032;
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid rgba(44, 53, 56, 0.12);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.82rem;
  color: rgba(44, 53, 56, 0.5);
}

.footer-bottom a {
  color: #C84032;
  text-decoration: none;
  font-weight: 600;
}

.footer-bottom a:hover {
  text-decoration: underline;
}

/* ========================================
   工具类
   ======================================== */
.text-accent {
  color: #C84032;
}

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

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

.text-center .section-label {
  border-left: none;
  padding-left: 0;
  border-bottom: 3px solid #C84032;
  padding-bottom: 4px;
}

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.68;
  line-height: 1.8;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }

/* ========================================
   动效定义
   ======================================== */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes pulse_soft {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.5; }
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
  .hero h1 { font-size: 2.6rem; }
  .footer-grid { grid-template-columns: 1.2fr 1fr 1fr; }
}

@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .feature-image {
    min-height: 240px;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

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

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(250, 246, 239, 0.98);
    backdrop-filter: blur(20px);
    padding: 20px 24px 28px;
    gap: 8px;
    box-shadow: 0 18px 40px rgba(44, 53, 56, 0.12);
    border-bottom: 1px solid rgba(44, 53, 56, 0.08);
    animation: fadeIn 0.25s ease both;
  }

  .main-nav.open li {
    width: 100%;
  }

  .main-nav.open a {
    display: block;
    padding: 12px 8px;
    font-size: 1.02rem;
    border-bottom: 1px solid rgba(44, 53, 56, 0.06);
  }

  .main-nav.open .nav-cta {
    text-align: center;
    margin-top: 10px;
    border-bottom: none;
  }

  .hero {
    min-height: 70vh;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero::before {
    font-size: 12rem;
  }

  .section {
    padding: 64px 0;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .cards-grid,
  .content-wall {
    gap: 20px;
  }

  .category-card {
    padding: 24px 20px;
  }

  .cta-banner {
    padding: 56px 24px;
  }

  .cta-banner::after {
    font-size: 2.2rem;
  }

  .stat-number {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-buttons {
    flex-direction: column;
    gap: 14px;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .hero h1 {
    font-size: 1.9rem;
    letter-spacing: -0.02em;
  }

  .hero p {
    font-size: 0.98rem;
  }

  .hero-eyebrow {
    font-size: 0.7rem;
    padding: 6px 14px;
  }

  .section {
    padding: 52px 0;
  }

  .section-desc {
    margin-bottom: 32px;
    font-size: 0.95rem;
  }

  .cta-banner {
    padding: 44px 16px;
    border-radius: 0;
  }

  .cta-banner p {
    font-size: 0.9rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-brand p {
    max-width: 100%;
  }

  .stat-item {
    padding: 28px 16px;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .feature-image {
    min-height: 200px;
  }

  .content-wall-item img {
    height: 180px;
  }

  .faq-item .faq-question {
    padding: 16px 18px;
    font-size: 0.92rem;
  }

  .faq-item .faq-answer {
    margin: 0 18px;
    padding: 16px 0 18px;
    font-size: 0.88rem;
  }
}

/* ========================================
   辅助效果 — 暗色模式不支持 · 纯亮色世界
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}