:root {
  --orange: #f58220;
  --orange-dark: #e06d0c;
  --ink: #1b1b1b;
  --muted: #5e5e5e;
  --line: #ececec;
  --soft: #f6f6f6;
  --white: #fff;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  --header: 78px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font-family: inherit; }
button { cursor: pointer; }

.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  height: var(--header);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
}
.site-header.scrolled { border-bottom-color: var(--line); box-shadow: 0 6px 20px rgba(0,0,0,.04); }
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 28px;
}
.logo img { height: 42px; width: auto; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a, .nav-drop > a {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 12px;
  font-size: 15px;
  color: #2a2a2a;
}
.nav a:hover, .nav a.active, .nav-drop > a:hover { color: var(--orange); }
.nav-drop { position: relative; }
.nav-drop .drop {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 168px;
  padding: 8px;
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: .2s ease;
}
.nav-drop:hover .drop, .nav-drop:focus-within .drop {
  opacity: 1;
  pointer-events: auto;
  transform: none;
}
.nav-drop .drop a { display: block; height: auto; padding: 8px 12px; border-radius: 8px; }
.nav-drop .drop a:hover { background: #fff6ee; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.nav-toggle { display: none; width: 42px; height: 42px; border: 0; background: transparent; padding: 10px; }
.nav-toggle span { display: block; height: 2px; background: #222; margin: 5px 0; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 22px;
  border-radius: 999px;
  border: 0;
  font-size: 15px;
  font-weight: 600;
}
.btn-orange { background: var(--orange); color: #fff; }
.btn-orange:hover { background: var(--orange-dark); }
.btn-line { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.7); }
.btn-line-dark { background: #fff; color: var(--ink); border: 1px solid #ddd; }
.btn-line-dark:hover { border-color: var(--orange); color: var(--orange); }

.hero { position: relative; height: min(760px, calc(100vh - var(--header))); min-height: 560px; overflow: hidden; background: #111; }
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity .6s ease;
  background-size: cover;
  background-position: center;
}
.hero-slide.active { opacity: 1; }
.hero-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0,0,0,.55) 0%, rgba(0,0,0,.28) 48%, rgba(0,0,0,.12) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  color: #fff;
  max-width: 720px;
}
.hero h1 { margin: 0 0 22px; font-size: clamp(36px, 4.6vw, 58px); line-height: 1.18; font-weight: 700; letter-spacing: -0.02em; }
.checks { list-style: none; margin: 0 0 28px; padding: 0; }
.checks li { display: flex; gap: 10px; align-items: flex-start; margin: 8px 0; font-size: 16px; }
.checks i {
  flex: 0 0 18px;
  width: 18px; height: 18px; margin-top: 3px;
  border-radius: 50%;
  background: var(--orange);
  position: relative;
}
.checks i::after {
  content: "";
  position: absolute;
  left: 5px; top: 3px;
  width: 5px; height: 8px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.hero-dots { position: absolute; z-index: 2; left: 50%; bottom: 22px; transform: translateX(-50%); display: flex; gap: 8px; }
.hero-dots button { width: 9px; height: 9px; border-radius: 50%; border: 0; background: rgba(255,255,255,.55); padding: 0; }
.hero-dots button.active { background: var(--orange); }

.section { padding: 88px 0; }
.section-head { text-align: center; max-width: 820px; margin: 0 auto 40px; }
.section-head h2 { margin: 0 0 12px; font-size: clamp(30px, 3vw, 42px); letter-spacing: -0.02em; }
.section-head h2::after {
  content: "";
  display: block;
  width: 54px; height: 3px;
  margin: 14px auto 0;
  background: var(--orange);
}
.section-head p { margin: 16px 0 0; color: var(--muted); }

.mosaic {
  display: grid;
  grid-template-columns: 1.15fr 1fr 1fr;
  grid-template-rows: 250px 250px;
  gap: 14px;
}
.tile {
  position: relative;
  overflow: hidden;
  border-radius: 4px;
  background-size: cover;
  background-position: center;
  color: #fff;
  display: flex;
  align-items: flex-end;
  min-height: 220px;
}
.tile::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,.05), rgba(0,0,0,.45));
  transition: .3s ease;
}
.tile:hover::before { background: rgba(0,0,0,.38); }
.tile-lg { grid-column: 1; grid-row: 1 / span 2; background-position: 20% center; }
.tile span {
  position: relative;
  z-index: 1;
  padding: 22px;
  font-size: 28px;
  font-weight: 700;
  letter-spacing: .08em;
}
.tile em {
  position: absolute;
  z-index: 1;
  left: 50%;
  top: 58%;
  transform: translate(-50%, -50%);
  background: #fff;
  color: var(--orange);
  border-radius: 999px;
  padding: 8px 16px 8px 18px;
  font-style: normal;
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transition: .25s ease;
  white-space: nowrap;
}
.tile em b {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--orange); color: #fff;
  display: grid; place-items: center; font-weight: 500;
}
.tile:hover em { opacity: 1; }

.pergola-mini {
  margin-top: 14px;
  display: grid;
  grid-template-columns: 280px 1fr auto;
  gap: 22px;
  align-items: center;
  padding: 12px 18px 12px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.pergola-mini:hover { border-color: #f3c08a; box-shadow: var(--shadow); }
.pergola-mini img { width: 100%; height: 112px; object-fit: cover; border-radius: 4px; }
.pergola-mini .tag {
  display: inline-block;
  margin-bottom: 4px;
  color: var(--orange);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
}
.pergola-mini h3 { margin: 0; font-size: 22px; }
.pergola-mini p { margin: 4px 0 0; color: var(--muted); font-size: 14px; }
.pergola-mini .go {
  color: var(--orange);
  font-weight: 700;
  white-space: nowrap;
}

.about-band { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.about-band h2 { margin: 0 0 8px; font-size: 36px; }
.about-band h2::after { content: ""; display: block; width: 54px; height: 3px; background: var(--orange); margin-top: 14px; }
.about-band p { color: var(--muted); }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.stat { background: var(--soft); padding: 22px 18px; border-radius: 8px; }
.stat strong { display: block; font-size: 34px; color: var(--orange); line-height: 1.1; }
.stat span { color: #444; font-size: 14px; }

.soft { background: var(--soft); }
.feature-grid, .why-grid, .serve-grid, .card-grid { display: grid; gap: 18px; }
.feature-grid { grid-template-columns: 1fr 1fr; }
.feature, .why, .serve, .post, .spec {
  background: #fff;
  border-radius: 10px;
  padding: 26px 24px;
}
.soft .feature, .soft .why, .soft .serve { box-shadow: none; }
.feature h3, .why h3, .serve h3 { margin: 0 0 8px; font-size: 20px; }
.feature p, .why p, .serve p, .post p { margin: 0; color: var(--muted); }
.why-grid { grid-template-columns: repeat(4, 1fr); }
.why { background: var(--soft); }
.why ol { margin: 8px 0 0; padding-left: 18px; color: var(--muted); }
.serve-grid { grid-template-columns: repeat(4, 1fr); }
.serve { border: 1px solid var(--line); }

.project-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.project {
  position: relative;
  overflow: hidden;
  border-radius: 6px;
  min-height: 240px;
  background-size: cover;
  background-position: center;
  color: #fff;
  display: flex;
  align-items: flex-end;
}
.project::before { content: ""; position: absolute; inset: 0; background: linear-gradient(transparent, rgba(0,0,0,.62)); }
.project span { position: relative; z-index: 1; padding: 16px; font-weight: 600; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: step; }
.step { background: var(--soft); border-radius: 10px; padding: 22px 18px; min-height: 150px; }
.step::before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  place-items: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--orange);
  color: #fff;
  font-weight: 700;
  margin-bottom: 12px;
}
.step h3 { margin: 0; font-size: 18px; }

.card-grid { grid-template-columns: repeat(3, 1fr); }
.post { padding: 0; overflow: hidden; border: 1px solid var(--line); }
.post img { width: 100%; height: 190px; object-fit: cover; }
.post div { padding: 18px 18px 22px; }
.post time { color: var(--orange); font-size: 13px; }
.post h3 { margin: 6px 0 8px; font-size: 18px; line-height: 1.45; }

.site-footer { background: #1c1c1c; color: #d7d7d7; padding: 56px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
.site-footer h4 { margin: 0 0 12px; color: #fff; font-size: 16px; }
.site-footer a { display: block; color: #cfcfcf; margin: 6px 0; font-size: 14px; }
.site-footer a:hover { color: var(--orange); }
.site-footer p { margin: 0; font-size: 14px; color: #bdbdbd; }
.footer-logo { height: 36px; width: auto; margin-bottom: 12px; background: #fff; border-radius: 4px; padding: 4px 8px; }
.copy { margin-top: 28px; padding-top: 16px; border-top: 1px solid #333; font-size: 13px; color: #8d8d8d; }

.dock {
  position: fixed;
  right: 16px;
  bottom: 24px;
  z-index: 30;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.dock button, .dock a {
  width: 46px; height: 46px;
  border-radius: 8px;
  border: 0;
  background: var(--orange);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 8px 18px rgba(245,130,32,.35);
}
.dock svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; }

.modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(0,0,0,.45);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal.open { display: flex; }
.modal-card {
  width: min(560px, 100%);
  background: #fff;
  border-radius: 14px;
  padding: 28px 26px 24px;
  position: relative;
}
.modal-card h3 { margin: 0 0 6px; font-size: 24px; }
.modal-card .sub { margin: 0 0 16px; color: var(--muted); font-size: 14px; }
.modal-close { position: absolute; right: 12px; top: 10px; border: 0; background: transparent; font-size: 26px; line-height: 1; color: #666; }
.form { display: grid; gap: 12px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
label { display: grid; gap: 6px; font-size: 13px; color: #444; }
input, select, textarea {
  width: 100%;
  border: 1px solid #e3e3e3;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 15px;
  background: #fff;
}
textarea { min-height: 96px; resize: vertical; }
.form .error { color: #c0392b; font-size: 13px; display: none; }
.form.invalid .error { display: block; }
.success-box { display: none; background: #f4fbf6; border: 1px solid #cfeedd; border-radius: 10px; padding: 16px; }
.success-box.show { display: block; }
.form.hidden { display: none; }

.page-hero {
  height: 280px;
  background-size: cover;
  background-position: center;
  position: relative;
  display: flex;
  align-items: flex-end;
  color: #fff;
}
.page-hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(transparent, rgba(0,0,0,.62)); }
.page-hero .container { position: relative; z-index: 1; padding-bottom: 32px; }
.page-hero h1 { margin: 0; font-size: clamp(32px, 4vw, 48px); }
.page-hero p { margin: 6px 0 0; color: rgba(255,255,255,.88); }
.crumbs { font-size: 13px; opacity: .85; margin-bottom: 8px; }
.crumbs a:hover { color: var(--orange); }

.prose { max-width: 760px; }
.prose h2 { margin: 28px 0 8px; font-size: 26px; }
.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 36px; align-items: center; }
.split img, .frame { width: 100%; border-radius: 8px; object-fit: cover; }
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.gallery figure { margin: 0; }
.gallery img { width: 100%; height: 220px; object-fit: cover; border-radius: 6px; }
.gallery figcaption { font-size: 13px; color: var(--muted); margin-top: 6px; }
.spec-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.spec { background: var(--soft); }
.spec strong { display: block; font-size: 15px; }
.spec span { color: var(--muted); font-size: 14px; }
.series { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.series a { display: block; }
.series img { height: 160px; width: 100%; object-fit: cover; border-radius: 6px; }
.series span { display: block; margin-top: 6px; font-size: 14px; font-weight: 600; }

.article { max-width: 780px; margin: 0 auto; }
.article img.cover { width: 100%; height: 380px; object-fit: cover; border-radius: 8px; margin-bottom: 18px; }
.article h1 { margin: 0 0 8px; font-size: 36px; line-height: 1.3; }
.article .meta { color: var(--muted); margin-bottom: 18px; }

@media (max-width: 980px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed;
    inset: var(--header) 0 auto 0;
    background: #fff;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 10px 16px 18px;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    margin: 0;
  }
  .nav.open { display: flex; }
  .nav-drop .drop { position: static; opacity: 1; pointer-events: auto; transform: none; box-shadow: none; padding: 0 0 0 12px; }
  .mosaic, .about-band, .feature-grid, .why-grid, .serve-grid, .project-grid, .steps, .card-grid, .footer-grid, .split, .gallery, .spec-grid, .series, .form-row {
    grid-template-columns: 1fr 1fr;
  }
  .mosaic { grid-template-rows: 220px 220px 220px; }
  .tile-lg { grid-column: 1 / span 2; grid-row: auto; min-height: 260px; }
  .footer-grid, .why-grid, .serve-grid { grid-template-columns: 1fr 1fr; }
  .pergola-mini { grid-template-columns: 160px 1fr; }
  .pergola-mini .go { display: none; }
  .hero { min-height: 520px; height: auto; }
  .hero-content { padding: 72px 0; }
}
@media (max-width: 680px) {
  .section-head { padding: 0 56px; }
  .mosaic, .about-band, .feature-grid, .why-grid, .serve-grid, .project-grid, .steps, .card-grid, .footer-grid, .split, .gallery, .spec-grid, .series, .form-row, .stats {
    grid-template-columns: 1fr;
  }
  .tile-lg { grid-column: auto; }
  .pergola-mini { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .header-inner .btn { display: none; }
  .article img.cover { height: 220px; }
}