/* ===== 基础变量与重置 ===== */
:root {
  --red: #b91c1c;
  --red-deep: #8a1414;
  --gold: #c9a24b;
  --gold-soft: #e7d4a6;
  --cream: #fbf7f0;
  --ink: #2a2622;
  --muted: #6b5e54;
  --line: #e7ded2;
  --white: #ffffff;
  --shadow: 0 10px 30px rgba(60, 40, 20, .12);
  --radius: 16px;
  --maxw: 1140px;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--cream);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 28px; border-radius: 999px; font-size: 15px; font-weight: 600;
  cursor: pointer; border: 1.5px solid transparent; transition: .25s ease;
  font-family: var(--sans);
}
.btn-primary { background: var(--red); color: #fff; box-shadow: 0 8px 20px rgba(185,28,28,.28); }
.btn-primary:hover { background: var(--red-deep); transform: translateY(-2px); }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.7); }
.btn-ghost:hover { background: rgba(255,255,255,.22); }
.btn-block { width: 100%; }

/* ===== 顶部导航 ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  transition: .3s ease; padding: 14px 0;
  background: transparent;
}
.site-header.scrolled {
  background: rgba(251,247,240,.96);
  box-shadow: 0 4px 18px rgba(60,40,20,.1);
  backdrop-filter: blur(8px);
  padding: 10px 0;
}
.nav-wrap { display: flex; align-items: center; justify-content: space-between; }

.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 12px;
  background: var(--red); color: #fff; font-family: var(--serif);
  display: grid; place-items: center; font-size: 24px; font-weight: 700;
  box-shadow: 0 6px 14px rgba(185,28,28,.3);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-family: var(--serif); font-size: 20px; color: #fff; letter-spacing: 2px; }
.brand-text small { font-size: 10px; letter-spacing: 3px; color: rgba(255,255,255,.75); }
.site-header.scrolled .brand-text strong { color: var(--ink); }
.site-header.scrolled .brand-text small { color: var(--muted); }

.nav { display: flex; gap: 30px; }
.nav a { color: #fff; font-size: 15px; font-weight: 500; position: relative; transition: .2s; }
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; height: 2px; width: 0;
  background: var(--gold); transition: .25s;
}
.nav a:hover::after { width: 100%; }
.site-header.scrolled .nav a { color: var(--ink); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 6px; }
.nav-toggle span { width: 26px; height: 2px; background: #fff; transition: .3s; }
.site-header.scrolled .nav-toggle span { background: var(--ink); }

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  /* 图片未加载完成时，先显示品牌红渐变兜底，避免黑屏 */
  background:
    url("../../img/hero.jpg") center/cover no-repeat,
    linear-gradient(135deg, #7a1e12 0%, #4a130b 60%, #2e0d06 100%);
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(105deg, rgba(35,16,8,.58) 0%, rgba(35,16,8,.32) 45%, rgba(35,16,8,.12) 100%);
}
.hero-content { position: relative; z-index: 2; color: #fff; max-width: 760px; padding-top: 80px; }
.hero-badge {
  display: inline-block; padding: 6px 16px; border: 1px solid var(--gold-soft);
  border-radius: 999px; font-size: 13px; letter-spacing: 2px; color: var(--gold-soft);
  margin-bottom: 22px;
}
.hero h1 { font-family: var(--serif); font-size: clamp(34px, 6vw, 60px); line-height: 1.2; font-weight: 700; letter-spacing: 1px; }
.hero-sub { margin: 22px 0 34px; font-size: clamp(15px, 2.2vw, 18px); color: rgba(255,255,255,.88); }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; }
.scroll-hint {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  z-index: 2; color: #fff; font-size: 30px; animation: bounce 1.8s infinite;
}
@keyframes bounce { 0%,100% { transform: translate(-50%,0); } 50% { transform: translate(-50%,10px); } }

/* ===== 通用 section ===== */
.section { padding: 96px 0; }
.eyebrow {
  display: inline-block; color: var(--red); font-weight: 700; letter-spacing: 3px;
  font-size: 13px; margin-bottom: 12px; position: relative; padding-left: 26px;
}
.eyebrow::before { content: ""; position: absolute; left: 0; top: 50%; width: 18px; height: 2px; background: var(--red); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 54px; }
.section-head h2 { font-family: var(--serif); font-size: clamp(26px, 4vw, 38px); color: var(--ink); }
.section-head p { color: var(--muted); margin-top: 14px; }

/* ===== 关于我们 ===== */
.about { background: var(--white); }
.about-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.about-text h2 { font-family: var(--serif); font-size: clamp(26px, 4vw, 38px); line-height: 1.3; margin-bottom: 20px; }
.about-text p { color: var(--muted); margin-bottom: 16px; }
.about-values { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; }
.about-values > div {
  flex: 1; min-width: 150px; background: var(--cream); border: 1px solid var(--line);
  border-radius: 12px; padding: 16px 18px;
}
.about-values b { display: block; color: var(--red); font-size: 13px; letter-spacing: 2px; margin-bottom: 4px; }
.about-values span { font-size: 14px; color: var(--ink); }

.about-media { position: relative; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.about-media img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4/5; }
.about-media-quote {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 26px;
  background: linear-gradient(transparent, rgba(20,10,5,.8));
}
.about-media-quote p { color: #fff; font-family: var(--serif); font-size: 18px; }

/* ===== 核心业务 ===== */
.services { background: var(--cream); }
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 26px; transition: .3s ease; position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0; background: linear-gradient(160deg, var(--red), var(--red-deep));
  opacity: 0; transition: .3s;
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow); border-color: transparent; }
.card:hover::before { opacity: 1; }
.card > * { position: relative; z-index: 1; }
.card-icon { width: 56px; height: 56px; border-radius: 14px; background: var(--cream); display: grid; place-items: center; margin-bottom: 18px; transition: .3s; }
.card-icon svg { width: 30px; height: 30px; fill: var(--red); }
.card h3 { font-family: var(--serif); font-size: 20px; margin-bottom: 10px; transition: .3s; }
.card p { color: var(--muted); font-size: 14.5px; transition: .3s; }
.card:hover .card-icon { background: rgba(255,255,255,.18); }
.card:hover .card-icon svg { fill: #fff; }
.card:hover h3, .card:hover p { color: #fff; }

/* ===== 实力数据 ===== */
.stats { background: linear-gradient(135deg, var(--red), var(--red-deep)); color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat b { display: block; font-family: var(--serif); font-size: clamp(34px, 5vw, 52px); font-weight: 700; }
.stat span { color: rgba(255,255,255,.85); font-size: 15px; letter-spacing: 1px; }
.stats-note { text-align: center; color: rgba(255,255,255,.6); font-size: 12px; margin-top: 26px; }

/* ===== 活动风采 ===== */
.gallery { background: var(--white); }
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.gallery-item { position: relative; border-radius: var(--radius); overflow: hidden; cursor: pointer; box-shadow: var(--shadow); }
.gallery-item img { width: 100%; height: 320px; object-fit: cover; transition: transform .5s ease; }
.gallery-item:hover img { transform: scale(1.07); }
.gallery-item figcaption {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 22px;
  background: linear-gradient(transparent, rgba(20,10,5,.82)); color: #fff;
}
.gallery-item figcaption span { display: block; font-family: var(--serif); font-size: 19px; }
.gallery-item figcaption small { color: var(--gold-soft); }

/* ===== 加入我们 / 联系 ===== */
.contact { background: var(--cream); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.contact-info h2 { font-family: var(--serif); font-size: clamp(26px, 4vw, 36px); margin: 6px 0 16px; }
.contact-info p { color: var(--muted); margin-bottom: 24px; }
.contact-list { list-style: none; }
.contact-list li { padding: 14px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
.contact-list span { display: inline-block; width: 56px; color: var(--red); font-weight: 700; margin-right: 10px; }

.contact-form { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 7px; }
.field input, .field textarea {
  width: 100%; padding: 12px 14px; border: 1.5px solid var(--line); border-radius: 10px;
  font-family: var(--sans); font-size: 15px; background: var(--cream); color: var(--ink); transition: .2s;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--red); background: #fff; }
.field textarea { resize: vertical; }
.form-tip { margin-top: 14px; padding: 12px 14px; border-radius: 10px; background: #eafaf0; color: #1d7a45; font-size: 14px; }
.form-note { margin-top: 14px; font-size: 12px; color: var(--muted); }

/* ===== 页脚 ===== */
.site-footer { background: #221b16; color: #e8ddd0; padding: 54px 0 22px; }
.footer-grid { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 24px; padding-bottom: 28px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand .brand-mark { background: var(--red); }
.footer-brand strong { display: block; font-family: var(--serif); font-size: 17px; }
.footer-brand small { color: rgba(232,221,208,.6); font-size: 12px; }
.footer-nav { display: flex; gap: 26px; }
.footer-nav a { color: rgba(232,221,208,.8); font-size: 14px; transition: .2s; }
.footer-nav a:hover { color: var(--gold-soft); }
.footer-bottom { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; padding-top: 20px; font-size: 12px; color: rgba(232,221,208,.5); }

/* ===== 返回顶部 ===== */
.to-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 40; width: 46px; height: 46px;
  border-radius: 50%; border: 0; background: var(--red); color: #fff; font-size: 20px; cursor: pointer;
  box-shadow: 0 8px 18px rgba(185,28,28,.35); opacity: 0; visibility: hidden; transition: .3s;
}
.to-top.show { opacity: 1; visibility: visible; }

/* ===== 灯箱 ===== */
.lightbox {
  position: fixed; inset: 0; z-index: 80; background: rgba(15,8,4,.9);
  display: grid; place-items: center; padding: 30px;
}
.lightbox[hidden] { display: none; }
.lightbox img { max-width: 92vw; max-height: 88vh; border-radius: 10px; box-shadow: 0 20px 60px rgba(0,0,0,.5); }
.lightbox-close { position: absolute; top: 24px; right: 30px; background: none; border: 0; color: #fff; font-size: 40px; cursor: pointer; line-height: 1; }

/* ===== 滚动渐显 ===== */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ===== 响应式 ===== */
@media (max-width: 980px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 36px 24px; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav { position: fixed; top: 64px; right: 0; height: calc(100vh - 64px); width: 70%; max-width: 320px;
    background: rgba(251,247,240,.98); flex-direction: column; gap: 0; padding: 20px; transform: translateX(100%);
    transition: transform .3s ease; box-shadow: -8px 0 30px rgba(0,0,0,.12); }
  .nav.open { transform: translateX(0); }
  .nav a { color: var(--ink); padding: 16px 6px; border-bottom: 1px solid var(--line); width: 100%; }
  .nav a::after { display: none; }
  .nav-toggle { display: flex; }
  .about-grid { grid-template-columns: 1fr; gap: 34px; }
  .contact-grid { grid-template-columns: 1fr; gap: 34px; }
  .section { padding: 70px 0; }
}
@media (max-width: 520px) {
  .cards { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; gap: 30px; }
  .hero-cta { width: 100%; }
  .hero-cta .btn { flex: 1; }
  .footer-grid { flex-direction: column; align-items: flex-start; }
}

/* 移动端菜单按钮动画 */
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }