* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --paper: #f7f3ea;      /* 宣纸底 */
  --paper-deep: #efe8da;
  --ink: #1c1a17;        /* 墨色 */
  --ink-soft: #4a453d;
  --muted: #8a8378;
  --cinnabar: #a8322d;   /* 朱砂红 */
  --gold: #b08d47;
  --line: rgba(28,26,23,.12);
}
html { scroll-behavior: smooth; }
body {
  font-family: "Songti SC", "SimSun", "Noto Serif SC", serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.9;
  overflow-x: hidden;
  background-image:
    radial-gradient(circle at 15% 20%, rgba(176,141,71,.05), transparent 45%),
    radial-gradient(circle at 85% 80%, rgba(168,50,45,.04), transparent 45%);
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
.container { max-width: 1180px; margin: 0 auto; padding: 0 32px; }

/* 印章点缀 */
.seal {
  display: inline-flex; align-items: center; justify-content: center;
  width: 42px; height: 42px; border: 1.5px solid var(--cinnabar);
  color: var(--cinnabar); font-size: 13px; letter-spacing: 1px;
  line-height: 1.2; text-align: center; border-radius: 4px;
  font-family: "Songti SC", serif;
}

/* 顶部信息条 */
.topbar {
  border-bottom: 1px solid var(--line);
  font-size: 13px; color: var(--muted);
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}
.topbar .container { display: flex; justify-content: space-between; height: 42px; align-items: center; }

/* 导航 */
header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(247,243,234,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 84px; }
.logo { display: flex; align-items: center; gap: 14px; }
.logo-text { font-size: 26px; letter-spacing: 6px; font-weight: 600; color: var(--ink); }
.logo-sub {
  font-size: 11px; letter-spacing: 4px; color: var(--muted);
  font-family: "PingFang SC", sans-serif; margin-top: -4px;
}
.nav-links { display: flex; gap: 4px; list-style: none; }
.nav-links a {
  display: block; padding: 10px 20px; font-size: 15px;
  letter-spacing: 2px; color: var(--ink-soft); position: relative;
  transition: .3s;
}
.nav-links a::after {
  content: ''; position: absolute; left: 50%; bottom: 4px;
  width: 0; height: 1.5px; background: var(--cinnabar);
  transform: translateX(-50%); transition: .3s;
}
.nav-links a:hover, .nav-links a.active { color: var(--cinnabar); }
.nav-links a:hover::after, .nav-links a.active::after { width: 22px; }
.menu-toggle {
  display: none; background: none; border: none;
  font-size: 24px; color: var(--ink); cursor: pointer;
  font-family: serif;
}

/* Hero */
.hero {
  padding: 90px 0 100px; position: relative;
  border-bottom: 1px solid var(--line);
}
.hero .container { display: grid; grid-template-columns: 1.15fr .85fr; gap: 70px; align-items: center; }
.hero-tag {
  font-size: 13px; letter-spacing: 4px; color: var(--cinnabar);
  font-family: "PingFang SC", sans-serif; margin-bottom: 26px;
  display: flex; align-items: center; gap: 12px;
}
.hero-tag::before { content: ''; width: 36px; height: 1px; background: var(--cinnabar); }
.hero h1 {
  font-size: 58px; line-height: 1.35; font-weight: 600;
  letter-spacing: 4px; margin-bottom: 28px; color: var(--ink);
}
.hero h1 em {
  font-style: normal; color: var(--cinnabar); position: relative;
}
.hero h1 em::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 6px;
  height: 8px; background: rgba(168,50,45,.12); z-index: -1;
}
.hero p {
  color: var(--ink-soft); font-size: 16px; max-width: 520px;
  margin-bottom: 40px; line-height: 2.1;
}
.hero-btns { display: flex; gap: 18px; flex-wrap: wrap; }
.btn-ink {
  display: inline-block; padding: 13px 36px; font-size: 15px;
  letter-spacing: 3px; background: var(--ink); color: var(--paper);
  transition: .3s; border: 1px solid var(--ink);
}
.btn-ink:hover { background: var(--cinnabar); border-color: var(--cinnabar); }
.btn-line {
  display: inline-block; padding: 13px 36px; font-size: 15px;
  letter-spacing: 3px; color: var(--ink); border: 1px solid var(--ink);
  transition: .3s;
}
.btn-line:hover { background: var(--ink); color: var(--paper); }

/* Hero 右侧 */
.hero-right { position: relative; display: flex; justify-content: center; }
.ink-frame {
  width: 100%; max-width: 380px; aspect-ratio: 3/4;
  border: 1px solid var(--line); padding: 18px;
  background: var(--paper-deep); position: relative;
}
.ink-frame::before, .ink-frame::after {
  content: ''; position: absolute; width: 26px; height: 26px;
  border: 1.5px solid var(--cinnabar);
}
.ink-frame::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.ink-frame::after { bottom: -1px; right: -1px; border-left: none; border-top: none; }
.ink-inner {
  width: 100%; height: 100%; position: relative; overflow: hidden;
  background:
    linear-gradient(160deg, rgba(28,26,23,.92), rgba(28,26,23,.75)),
    url('https://images.unsplash.com/photo-1508804185872-d7badad00f7d?w=800') center/cover;
  display: flex; align-items: center; justify-content: center;
}
.ink-inner .vertical {
  writing-mode: vertical-rl; text-orientation: upright;
  color: var(--paper); font-size: 30px; letter-spacing: 10px;
  font-weight: 500;
}
.ink-inner .seal {
  position: absolute; bottom: 24px; right: 24px;
  width: 52px; height: 52px; font-size: 14px;
  background: var(--cinnabar); color: var(--paper);
  border: none; border-radius: 4px;
  font-family: "Songti SC", serif; letter-spacing: 2px;
}

/* 通用区块 */
.section { padding: 100px 0; }
.section-deep { background: var(--paper-deep); }
.section-title {
  text-align: center; margin-bottom: 64px; position: relative;
}
.section-title .kicker {
  font-size: 12px; letter-spacing: 6px; color: var(--muted);
  font-family: "PingFang SC", sans-serif; margin-bottom: 14px;
}
.section-title h2 {
  font-size: 38px; letter-spacing: 6px; font-weight: 600; color: var(--ink);
  display: inline-block; position: relative; padding: 0 40px;
}
.section-title h2::before, .section-title h2::after {
  content: ''; position: absolute; top: 50%; width: 24px; height: 1px;
  background: var(--cinnabar);
}
.section-title h2::before { left: 0; }
.section-title h2::after { right: 0; }
.section-title p { color: var(--muted); font-size: 15px; margin-top: 12px; letter-spacing: 1px; }

/* 首页简介 */
.about-home { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.about-img {
  position: relative; padding: 14px; border: 1px solid var(--line);
}
.about-img img { width: 100%; height: 380px; object-fit: cover; filter: sepia(.15) contrast(.95); }
.about-img .corner {
  position: absolute; width: 22px; height: 22px; border: 1.5px solid var(--cinnabar);
}
.about-img .corner.tl { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.about-img .corner.br { bottom: -1px; right: -1px; border-left: none; border-top: none; }
.about-text h3 {
  font-size: 28px; letter-spacing: 3px; margin-bottom: 22px; color: var(--ink);
  font-weight: 600; line-height: 1.5;
}
.about-text p { color: var(--ink-soft); margin-bottom: 16px; font-size: 15px; line-height: 2.1; }
.about-quote {
  margin-top: 28px; padding: 18px 24px; border-left: 2px solid var(--cinnabar);
  background: rgba(168,50,45,.04); color: var(--ink-soft);
  font-size: 15px; letter-spacing: 1px;
}

/* 业务 */
.biz-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; border: 1px solid var(--line); }
.biz-item {
  padding: 48px 44px; border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line); position: relative;
  transition: .35s; background: transparent;
}
.biz-item:nth-child(2n) { border-right: none; }
.biz-item:nth-child(n+3) { border-bottom: none; }
.biz-item:hover { background: var(--paper); }
.biz-no {
  font-size: 13px; letter-spacing: 3px; color: var(--cinnabar);
  font-family: "PingFang SC", sans-serif; margin-bottom: 16px;
}
.biz-item h3 {
  font-size: 24px; letter-spacing: 4px; margin-bottom: 14px;
  color: var(--ink); font-weight: 600;
}
.biz-item p { color: var(--ink-soft); font-size: 15px; line-height: 2; }
.biz-item .arrow {
  margin-top: 22px; font-size: 14px; letter-spacing: 2px;
  color: var(--cinnabar); display: inline-block;
}

/* 新闻 */
.news-list { display: flex; flex-direction: column; gap: 0; border-top: 1px solid var(--line); }
.news-row {
  display: grid; grid-template-columns: 130px 1fr 120px;
  gap: 32px; align-items: center; padding: 30px 8px;
  border-bottom: 1px solid var(--line); transition: .3s;
}
.news-row:hover { background: var(--paper); padding-left: 20px; padding-right: 20px; }
.news-date { font-size: 14px; color: var(--muted); letter-spacing: 1px; font-family: "PingFang SC", sans-serif; }
.news-date strong { display: block; font-size: 30px; color: var(--ink); font-weight: 600; }
.news-title h3 { font-size: 19px; letter-spacing: 2px; margin-bottom: 6px; color: var(--ink); font-weight: 600; }
.news-title p { color: var(--muted); font-size: 14px; }
.news-more { text-align: right; color: var(--cinnabar); font-size: 14px; letter-spacing: 2px; }

/* 页面 banner */
.page-banner {
  padding: 110px 0 80px; text-align: center; position: relative;
  border-bottom: 1px solid var(--line);
}
.page-banner .kicker {
  font-size: 12px; letter-spacing: 6px; color: var(--cinnabar);
  font-family: "PingFang SC", sans-serif; margin-bottom: 16px;
}
.page-banner h1 { font-size: 46px; letter-spacing: 8px; font-weight: 600; }
.page-banner p { color: var(--muted); margin-top: 14px; letter-spacing: 2px; font-size: 15px; }

/* 简介页 */
.about-block { max-width: 900px; margin: 0 auto; }
.about-block h2 {
  font-size: 26px; letter-spacing: 4px; margin: 48px 0 20px;
  color: var(--ink); font-weight: 600; position: relative; padding-left: 20px;
}
.about-block h2::before {
  content: ''; position: absolute; left: 0; top: 8px; bottom: 8px;
  width: 3px; background: var(--cinnabar);
}
.about-block p { color: var(--ink-soft); margin-bottom: 16px; text-indent: 2em; font-size: 15px; line-height: 2.1; }
.timeline { margin-top: 28px; position: relative; padding-left: 30px; border-left: 1px solid var(--line); }
.timeline .item { position: relative; padding-bottom: 32px; }
.timeline .item::before {
  content: ''; position: absolute; left: -37px; top: 10px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--paper); border: 2px solid var(--cinnabar);
}
.timeline .year { font-size: 15px; color: var(--cinnabar); letter-spacing: 2px; font-weight: 600; }
.timeline .desc { color: var(--ink-soft); font-size: 14px; }
.honor-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 24px; }
.honor {
  padding: 26px 20px; text-align: center; border: 1px solid var(--line);
  font-size: 15px; letter-spacing: 2px; color: var(--ink-soft);
  background: var(--paper); transition: .3s;
}
.honor:hover { border-color: var(--cinnabar); color: var(--cinnabar); }

/* 联系 */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.contact-info .item { display: flex; gap: 20px; padding: 24px 0; border-bottom: 1px dashed var(--line); }
.contact-info .item:first-child { padding-top: 0; }
.contact-info .ico {
  flex: 0 0 44px; height: 44px; border: 1px solid var(--cinnabar);
  color: var(--cinnabar); display: flex; align-items: center; justify-content: center;
  font-size: 16px; border-radius: 50%;
  font-family: "PingFang SC", sans-serif;
}
.contact-info h4 { font-size: 16px; letter-spacing: 2px; margin-bottom: 6px; color: var(--ink); }
.contact-info p { color: var(--muted); font-size: 14px; }
.contact-form { padding: 40px; border: 1px solid var(--line); background: var(--paper); }
.contact-form h3 { font-size: 22px; letter-spacing: 3px; margin-bottom: 24px; color: var(--ink); font-weight: 600; }
.contact-form input, .contact-form textarea {
  width: 100%; padding: 12px 0; margin-bottom: 18px;
  border: none; border-bottom: 1px solid var(--line);
  background: transparent; font-family: inherit; font-size: 15px;
  color: var(--ink); letter-spacing: 1px;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none; border-bottom-color: var(--cinnabar);
}
.contact-form textarea { height: 100px; resize: vertical; }
.contact-form button {
  margin-top: 10px; padding: 13px 36px; font-size: 15px;
  letter-spacing: 3px; background: var(--ink); color: var(--paper);
  border: none; cursor: pointer; transition: .3s; font-family: inherit;
}
.contact-form button:hover { background: var(--cinnabar); }

/* 页脚 */
footer {
  background: var(--ink); color: rgba(247,243,234,.7);
  padding: 70px 0 30px; margin-top: 80px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 50px; margin-bottom: 40px; }
.footer-grid h4 { color: var(--paper); font-size: 16px; letter-spacing: 3px; margin-bottom: 20px; font-weight: 600; }
.footer-grid p, .footer-grid li { font-size: 14px; line-height: 2.2; list-style: none; color: rgba(247,243,234,.6); }
.footer-grid a:hover { color: var(--paper); }
.copyright {
  text-align: center; border-top: 1px solid rgba(247,243,234,.12);
  padding-top: 24px; font-size: 13px; color: rgba(247,243,234,.4); letter-spacing: 1px;
}

/* 响应式 */
@media (max-width: 992px) {
  .hero .container { grid-template-columns: 1fr; gap: 50px; }
  .hero h1 { font-size: 44px; }
  .about-home { grid-template-columns: 1fr; gap: 40px; }
  .biz-grid { grid-template-columns: 1fr; }
  .biz-item { border-right: none; border-bottom: 1px solid var(--line); }
  .biz-item:last-child { border-bottom: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .honor-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav-links {
    position: absolute; top: 84px; left: 0; right: 0;
    background: var(--paper); flex-direction: column; padding: 16px 32px;
    border-bottom: 1px solid var(--line); display: none;
  }
  .nav-links.open { display: flex; }
  .menu-toggle { display: block; }
  .hero { padding: 60px 0 70px; }
  .hero h1 { font-size: 32px; letter-spacing: 2px; }
  .hero p { font-size: 15px; }
  .section { padding: 70px 0; }
  .section-title h2 { font-size: 28px; letter-spacing: 3px; padding: 0 30px; }
  .section-title h2::before, .section-title h2::after { width: 16px; }
  .news-row { grid-template-columns: 1fr; gap: 10px; }
  .news-more { text-align: left; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .honor-grid { grid-template-columns: 1fr; }
  .page-banner h1 { font-size: 32px; letter-spacing: 5px; }
}