/* ========================================================
   阿泽作品分享 - 简约 SketchUp 插件管理器官网
   ======================================================== */

:root {
  --color-bg: #FAF9F6;
  --color-surface: #FFFFFF;
  --color-surface-soft: #F4F1EA;
  --color-text: #1C1B19;
  --color-text-secondary: #5C5852;
  --color-text-muted: #8E8980;
  --color-primary: #1C1B19;
  --color-primary-hover: #33302B;
  --color-accent: #B07E4C;
  --color-accent-subtle: #F2EADF;
  --color-border: #E6E1D8;
  --color-border-light: #F0ECE4;

  --font-serif: "Songti SC", "Source Han Serif SC", "Noto Serif SC", "STSong", "SimSun", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;

  --shadow-sm: 0 2px 10px rgba(28, 27, 25, 0.04);
  --shadow-md: 0 8px 30px rgba(28, 27, 25, 0.07);
  --shadow-lg: 0 20px 50px rgba(28, 27, 25, 0.12);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-pill: 9999px;

  --container-max: 1160px;
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  transition: var(--transition);
}

[hidden] {
  display: none !important;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ================= Navbar ================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 246, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-text);
}

.brand-ver {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-accent);
  background: var(--color-accent-subtle);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}

.brand-sub {
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
  text-transform: uppercase;
  margin-top: -1px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-item a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  position: relative;
  padding: 6px 0;
}

.nav-item a:hover,
.nav-item.active a {
  color: var(--color-text);
}

.nav-item a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: var(--transition);
}

.nav-item a:hover::after,
.nav-item.active a::after {
  width: 100%;
}

.nav-action {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  background-color: var(--color-primary);
  color: #FAF9F6;
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: #FAF9F6;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  background-color: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: 0.9rem;
  font-weight: 500;
}

.btn-secondary:hover {
  background-color: var(--color-surface);
  border-color: var(--color-text);
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: var(--transition);
}

/* ================= Hero Section ================= */
.hero-section {
  padding: 58px 0 60px;
}

.hero-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 40px;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background-color: var(--color-accent-subtle);
  color: var(--color-accent);
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 22px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: var(--color-text);
  margin-bottom: 20px;
}

.hero-title em {
  font-style: normal;
  color: var(--color-accent);
  white-space: nowrap;
}

.hero-title span {
  white-space: nowrap;
}

.hero-subtitle {
  font-size: 1.06rem;
  color: var(--color-text-secondary);
  line-height: 1.85;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-visual-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.hero-visual-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 28px;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
}

.visual-info-title {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 600;
}

.visual-info-meta {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ================= Stats Section ================= */
.stats-section {
  padding: 36px 0;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 8px;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
  margin-bottom: 6px;
}

.stat-number span {
  color: var(--color-accent);
}

.stat-label {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
}

/* ================= Shared Section Headers ================= */
.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 44px;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.2rem;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.3;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 0.98rem;
  color: var(--color-text-secondary);
}

/* ================= Features Section ================= */
.features-section {
  padding: 88px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  padding: 34px 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.feature-card:hover {
  border-color: var(--color-border);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.feature-num {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.85;
  margin-bottom: 14px;
}

.feature-title {
  font-family: var(--font-serif);
  font-size: 1.24rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ================= FAQ Section ================= */
.faq-section {
  padding: 88px 0;
  background-color: var(--color-surface-soft);
  border-top: 1px solid var(--color-border);
}

.faq-list {
  max-width: 780px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.active {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 26px;
  font-family: var(--font-serif);
  font-size: 1.04rem;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--color-accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.faq-answer-inner {
  padding: 14px 26px 20px;
  font-size: 0.93rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  border-top: 1px solid var(--color-border-light);
}

/* ================= Footer ================= */
.site-footer {
  background: #191816;
  color: #BEB9AF;
  padding: 56px 0 36px;
  border-top: 1px solid #2B2824;
}

.footer-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-bottom: 26px;
  border-bottom: 1px solid #2B2824;
}

.footer-brand-title {
  font-family: var(--font-serif);
  font-size: 1.24rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #FAF7F2;
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 0.9rem;
  line-height: 1.8;
  max-width: 900px;
  margin: 0 auto;
  color: #9C968B;
  white-space: nowrap;
}

.footer-bottom {
  padding-top: 22px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
}

.compliance-box {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.86rem;
}

.compliance-sep {
  color: #4A4640;
}

.icp-link {
  color: #8E887E;
  transition: var(--transition);
}

.icp-link:hover {
  color: #FAF7F2;
}

.police-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.police-icon {
  flex-shrink: 0;
}

.copyright-text {
  font-size: 0.86rem;
  color: #8E887E;
  letter-spacing: 0.01em;
}

/* ================= Responsive ================= */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.4rem;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links,
  .nav-action .btn-primary {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .hero-title {
    font-size: 2rem;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .hero-visual-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-header.mobile-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    background: #FAF9F6;
    padding: 20px 24px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    gap: 16px;
  }

  .footer-brand-desc {
    white-space: normal;
    max-width: 100%;
  }
}