:root {
  --brand-primary: #ff6b35;
  --brand-secondary: #ffb347;
  --brand-accent: #ff8c42;
  --brand-deep: #e04e1a;
  --bg-base: #fff8f3;
  --bg-surface: #ffffff;
  --bg-elevated: #ffffff;
  --bg-muted: #fdf0e8;
  --text-primary: #2b1d16;
  --text-secondary: #6b5449;
  --text-tertiary: #9c877a;
  --border-soft: rgba(255, 107, 53, 0.14);
  --border-strong: rgba(255, 107, 53, 0.32);
  --shadow-sm: 0 2px 8px rgba(224, 78, 26, 0.08);
  --shadow-md: 0 8px 24px rgba(224, 78, 26, 0.12);
  --shadow-lg: 0 16px 48px rgba(224, 78, 26, 0.18);
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.55);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --gradient-hero: linear-gradient(135deg, #ff6b35 0%, #ff8c42 45%, #ffb347 100%);
  --gradient-soft: linear-gradient(135deg, rgba(255, 107, 53, 0.12), rgba(255, 179, 71, 0.12));
  --gradient-text: linear-gradient(120deg, #e04e1a, #ff8c42 60%, #ffb347);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --font-stack: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-base: #16100d;
    --bg-surface: #1f1712;
    --bg-elevated: #2a1f18;
    --bg-muted: #241a14;
    --text-primary: #f7ece5;
    --text-secondary: #c9b4a8;
    --text-tertiary: #8f7a6d;
    --border-soft: rgba(255, 140, 66, 0.16);
    --border-strong: rgba(255, 140, 66, 0.36);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
    --glass-bg: rgba(31, 23, 18, 0.66);
    --glass-border: rgba(255, 140, 66, 0.18);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 96px;
}

body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-base);
  background-image:
    radial-gradient(circle at 12% 8%, rgba(255, 179, 71, 0.16), transparent 42%),
    radial-gradient(circle at 88% 4%, rgba(255, 107, 53, 0.14), transparent 40%),
    radial-gradient(circle at 50% 100%, rgba(255, 140, 66, 0.08), transparent 55%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

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

a {
  color: var(--brand-deep);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover,
a:focus-visible {
  color: var(--brand-primary);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(1.75rem, 4.2vw, 2.9rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 2.2vw, 1.45rem); }
h4 { font-size: clamp(1rem, 1.8vw, 1.2rem); }

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

strong {
  color: var(--brand-deep);
  font-weight: 700;
}

::selection {
  background: rgba(255, 107, 53, 0.28);
  color: var(--text-primary);
}

/* ================= 滚动条 ================= */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--bg-muted);
}
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--brand-primary), var(--brand-secondary));
  border-radius: var(--radius-pill);
  border: 2px solid var(--bg-muted);
}

/* ================= Header ================= */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), background var(--transition-base);
}

header:hover {
  box-shadow: var(--shadow-md);
}

header > div[role="banner"] {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.85rem clamp(1rem, 4vw, 2.5rem);
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 2vw, 2rem);
  flex-wrap: wrap;
}

header > div[role="banner"] > a[aria-label="甜橘剧场首页"] {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  white-space: nowrap;
  position: relative;
  padding-left: 1.9rem;
  transition: transform var(--transition-fast);
}

header > div[role="banner"] > a[aria-label="甜橘剧场首页"]::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 1.35rem;
  height: 1.35rem;
  transform: translateY(-50%);
  border-radius: 50%;
  background: var(--gradient-hero);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.15);
}

header > div[role="banner"] > a[aria-label="甜橘剧场首页"]::after {
  content: "";
  position: absolute;
  left: 0.42rem;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 0.5rem solid #fff;
  border-top: 0.32rem solid transparent;
  border-bottom: 0.32rem solid transparent;
}

header > div[role="banner"] > a[aria-label="甜橘剧场首页"]:hover {
  transform: translateY(-1px) scale(1.02);
}

header nav[aria-label="主导航"] {
  flex: 1 1 auto;
  min-width: 0;
}

header nav[aria-label="主导航"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 0.35rem;
  align-items: center;
}

header nav[aria-label="主导航"] a {
  display: inline-block;
  padding: 0.42rem 0.72rem;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  position: relative;
  transition: color var(--transition-fast), background var(--transition-fast), transform var(--transition-fast);
}

header nav[aria-label="主导航"] a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0.18rem;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient-hero);
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

header nav[aria-label="主导航"] a:hover {
  color: var(--brand-deep);
  background: rgba(255, 107, 53, 0.08);
  transform: translateY(-1px);
}

header nav[aria-label="主导航"] a:hover::after {
  width: 60%;
}

header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 0 1 auto;
  position: relative;
}

header form[role="search"] label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

header form[role="search"] input {
  width: clamp(9rem, 16vw, 15rem);
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), width var(--transition-base);
}

header form[role="search"] input::placeholder {
  color: var(--text-tertiary);
}

header form[role="search"] input:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.14);
  outline: none;
}

header form[role="search"] button {
  padding: 0.5rem 1.05rem;
  font-size: 0.85rem;
  font-weight: 600;
  font-family: inherit;
  color: #fff;
  background: var(--gradient-hero);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
}

header form[role="search"] button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 107, 53, 0.42);
  filter: brightness(1.05);
}

header form[role="search"] button:active {
  transform: translateY(0);
}

/* ================= Main 布局 ================= */
main {
  max-width: 1280px;
  margin: 0 auto;
  padding: clamp(1rem, 3vw, 2rem) clamp(1rem, 4vw, 2.5rem) 4rem;
  display: flex;
  flex-direction: column;
  gap: clamp(1.25rem, 3vw, 2.25rem);
}

/* ================= 面包屑 ================= */
main > nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--text-tertiary);
  padding: 0.55rem 1rem;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-pill);
  width: fit-content;
  box-shadow: var(--shadow-sm);
}

main > nav[aria-label="面包屑导航"] li {
  display: inline-flex;
  align-items: center;
}

main > nav[aria-label="面包屑导航"] li + li::before {
  content: "›";
  margin-right: 0.4rem;
  color: var(--brand-secondary);
  font-weight: 700;
}

main > nav[aria-label="面包屑导航"] a {
  color: var(--text-secondary);
}

main > nav[aria-label="面包屑导航"] a:hover {
  color: var(--brand-primary);
}

main > nav[aria-label="面包屑导航"] li[aria-current="page"] {
  color: var(--brand-deep);
  font-weight: 600;
}

/* ================= Hero ================= */
#hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.75rem, 4vw, 3.25rem);
  border-radius: var(--radius-lg);
  background: var(--gradient-hero);
  color: #fff;
  box-shadow: var(--shadow-lg);
  isolation: isolate;
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 15%, rgba(255, 255, 255, 0.32), transparent 45%),
    radial-gradient(circle at 8% 90%, rgba(255, 255, 255, 0.18), transparent 40%);
  z-index: -1;
}

#hero::after {
  content: "";
  position: absolute;
  top: -40%;
  right: -10%;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.22);
  z-index: -1;
  animation: heroFloat 9s ease-in-out infinite;
}

@keyframes heroFloat {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.6; }
  50% { transform: translate(-24px, 18px) scale(1.08); opacity: 0.9; }
}

#hero h1 {
  color: #fff;
  text-shadow: 0 2px 16px rgba(160, 50, 0, 0.3);
  margin-bottom: 1rem;
  max-width: 20ch;
}

#hero > p {
  color: rgba(255, 255, 255, 0.94);
  font-size: clamp(0.95rem, 1.6vw, 1.08rem);
  max-width: 72ch;
  line-height: 1.85;
}

#hero > p strong {
  color: #fff;
  background: rgba(255, 255, 255, 0.22);
  padding: 0.1rem 0.5rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
}

#hero figure {
  margin: 1.5rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(120, 30, 0, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.35);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

#hero figure:hover {
  transform: translateY(-4px) scale(1.008);
  box-shadow: 0 20px 56px rgba(120, 30, 0, 0.36);
}

#hero figure svg {
  width: 100%;
  display: block;
}

#hero figcaption {
  padding: 0.65rem 1rem;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.92);
  background: rgba(0, 0, 0, 0.18);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  text-align: center;
}

/* ================= 页内导航 ================= */
main > nav[aria-label="页内锚点导航"] {
  padding: 1.15rem 1.35rem;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

main > nav[aria-label="页内锚点导航"] h2 {
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: 0.75rem;
  font-weight: 600;
}

main > nav[aria-label="页内锚点导航"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

main > nav[aria-label="页内锚点导航"] a {
  display: inline-block;
  padding: 0.36rem 0.85rem;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
}

main > nav[aria-label="页内锚点导航"] a:hover {
  color: #fff;
  background: var(--gradient-hero);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 107, 53, 0.32);
}

/* ================= Section 通用 ================= */
main > section {
  padding: clamp(1.35rem, 3vw, 2.25rem);
  background: var(--bg-surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
  position: relative;
}

main > section:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

main > section > h2 {
  position: relative;
  padding-left: 1.1rem;
  margin-bottom: 1.1rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

main > section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 5px;
  border-radius: var(--radius-pill);
  background: var(--gradient-hero);
}

main > section > h3 {
  margin: 1.4rem 0 0.6rem;
  color: var(--text-primary);
}

main > section > h4 {
  margin: 1.1rem 0 0.5rem;
  color: var(--brand-deep);
  font-weight: 600;
}

main > section > p {
  max-width: 78ch;
}

/* ================= 卡片化子区块 (products/advantages/solutions/applications/cases) ================= */
#products > h3,
#advantages > h3,
#solutions > h3,
#applications > h3,
#cases > h3 {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.1rem;
  background: var(--gradient-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

#products > h3::before,
#advantages > h3::before,
#solutions > h3::before,
#applications > h3::before,
#cases > h3::before {
  content: "";
  flex: 0 0 auto;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--gradient-hero);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.16);
}

#products > h3:hover,
#advantages > h3:hover,
#solutions > h3:hover,
#applications > h3:hover,
#cases > h3:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
  border-color: var(--border-strong);
}

#products > h3 + p,
#advantages > h3 + p,
#solutions > h3 + p,
#applications > h3 + p,
#cases > h3 + p {
  padding-left: 1.7rem;
  border-left: 2px dashed var(--border-strong);
  margin-left: 0.3rem;
}

/* ================= 客户评价 ================= */
#reviews blockquote {
  position: relative;
  margin: 0 0 1rem;
  padding: 1.15rem 1.35rem 1.15rem 3.2rem;
  background: var(--bg-muted);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#reviews blockquote::before {
  content: "\201C";
  position: absolute;
  left: 1rem;
  top: 0.35rem;
  font-size: 3rem;
  line-height: 1;
  font-family: Georgia, "Times New Roman", serif;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

#reviews blockquote p {
  margin: 0;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-style: normal;
}

#reviews blockquote:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

/* ================= 新闻 & 文章 ================= */
#news article,
#articles article {
  padding: 1.15rem 1.25rem;
  margin-bottom: 1rem;
  background: var(--bg-muted);
  border: 1px solid var(--border-soft);
  border-left: 4px solid var(--brand-primary);
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-left-color var(--transition-fast), background var(--transition-fast);
}

#news article:last-child,
#articles article:last-child {
  margin-bottom: 0;
}

#news article:hover,
#articles article:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-left-color: var(--brand-secondary);
  background: var(--bg-surface);
}

#news article h3,
#articles article h3 {
  margin: 0 0 0.4rem;
  font-size: 1.12rem;
  color: var(--text-primary);
  transition: color var(--transition-fast);
}

#news article:hover h3,
#articles article:hover h3 {
  color: var(--brand-deep);
}

#news article p,
#articles article p {
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

#news article p:first-of-type,
#articles article p:first-of-type {
  font-size: 0.78rem;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
}

#news article a,
#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--brand-deep);
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-pill);
  background: rgba(255, 107, 53, 0.1);
  transition: all var(--transition-fast);
}

#news article a::after,
#articles article a::after {
  content: "→";
  transition: transform var(--transition-fast);
}

#news article a:hover,
#articles article a:hover {
  color: #fff;
  background: var(--gradient-hero);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.32);
}

#news article a:hover::after,
#articles article a:hover::after {
  transform: translateX(3px);
}

/* ================= FAQ ================= */
#faq details {
  margin-bottom: 0.75rem;
  background: var(--bg-muted);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

#faq details:last-child {
  margin-bottom: 0;
}

#faq details[open] {
  background: var(--bg-surface);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

#faq summary {
  position: relative;
  padding: 0.95rem 3rem 0.95rem 1.15rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text-primary);
  cursor: pointer;
  list-style: none;
  transition: color var(--transition-fast), background var(--transition-fast);
  user-select: none;
}

#faq summary::-webkit-details-marker {
  display: none;
}

#faq summary::after {
  content: "";
  position: absolute;
  right: 1.15rem;
  top: 50%;
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid var(--brand-primary);
  border-bottom: 2px solid var(--brand-primary);
  transform: translateY(-70%) rotate(45deg);
  transition: transform var(--transition-base);
}

#faq details[open] summary::after {
  transform: translateY(-30%) rotate(-135deg);
}

#faq summary:hover {
  color: var(--brand-deep);
  background: rgba(255, 107, 53, 0.06);
}

#faq details p {
  padding: 0 1.15rem 1.05rem;
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
  animation: faqReveal 0.35s ease;
}

@keyframes faqReveal {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ================= HowTo ================= */
#howto ol {
  counter-reset: howto-step;
  display: grid;
  gap: 0.75rem;
  margin: 0.75rem 0 1.25rem;
}

#howto ol li {
  counter-increment: howto-step;
  position: relative;
  padding: 0.9rem 1.1rem 0.9rem 3.4rem;
  background: var(--gradient-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  color: var(--text-secondary);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

#howto ol li::before {
  content: counter(howto-step);
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.75rem;
  height: 1.75rem;
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  background: var(--gradient-hero);
  border-radius: 50%;
  box-shadow: 0 4px 10px rgba(255, 107, 53, 0.3);
}

#howto ol li:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
  border-color: var(--border-strong);
}

#howto h3 {
  margin-top: 1.3rem;
}

/* ================= Contact ================= */
#contact address {
  font-style: normal;
  display: grid;
  gap: 0.5rem;
  padding: 1.15rem 1.35rem;
  background: var(--gradient-soft);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  margin: 1rem 0;
}

#contact address p {
  margin: 0;
  font-size: 0.92rem;
  display: flex;
  align-items: baseline;
  gap: 0.4rem;
  flex-wrap: wrap;
}

#contact address a {
  font-weight: 600;
  color: var(--brand-deep);
  border-bottom: 1px dashed transparent;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

#contact address a:hover {
  border-bottom-color: var(--brand-primary);
  color: var(--brand-primary);
}

/* ================= 网站地图 / 友情链接 ================= */
#sitemap ul,
#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

#sitemap ul li,
#links ul li {
  display: inline-flex;
}

#sitemap ul a,
#links ul a {
  display: inline-block;
  padding: 0.42rem 0.95rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-muted);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
}

#sitemap ul a:hover,
#links ul a:hover {
  color: #fff;
  background: var(--gradient-hero);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(255, 107, 53, 0.3);
}

/* ================= Team ================= */
#team {
  background: var(--gradient-soft);
  border-color: var(--border-strong);
}

#team p:last-child {
  font-size: 0.82rem;
  color: var(--text-tertiary);
  margin-bottom: 0;
}

/* ================= Footer ================= */
footer {
  position: relative;
  margin-top: 2rem;
  padding: clamp(2rem, 4vw, 3rem) clamp(1rem, 4vw, 2.5rem) 2rem;
  background: linear-gradient(180deg, rgba(255, 107, 53, 0.06), rgba(255, 179, 71, 0.04));
  border-top: 1px solid var(--border-soft);
}

footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-hero);
}

footer > section,
footer > nav {
  max-width: 1280px;
  margin: 0 auto 1.5rem;
}

footer > section h2 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.6rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

footer > section h2::before {
  content: "";
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--gradient-hero);
}

footer > section p {
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-bottom: 0.4rem;
  max-width: 80ch;
}

footer > nav[aria-label="页脚导航"] {
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-soft);
}

footer > nav[aria-label="页脚导航"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: center;
}

footer > nav[aria-label="页脚导航"] a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  position: relative;
  padding-bottom: 2px;
}

footer > nav[aria-label="页脚导航"] a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--gradient-hero);
  transition: width var(--transition-base);
}

footer > nav[aria-label="页脚导航"] a:hover {
  color: var(--brand-deep);
}

footer > nav[aria-label="页脚导航"] a:hover::after {
  width: 100%;
}

/* ================= 滚动动画 ================= */
@keyframes revealUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@supports (animation-timeline: view()) {
  main > section,
  main > nav[aria-label="页内锚点导航"] {
    animation: revealUp linear both;
    animation-timeline: view();
    animation-range: entry 0% cover 28%;
  }
}

@supports not (animation-timeline: view()) {
  main > section {
    opacity: 0;
    animation: revealUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  }
  main > section:nth-of-type(1) { animation-delay: 0.05s; }
  main > section:nth-of-type(2) { animation-delay: 0.1s; }
  main > section:nth-of-type(3) { animation-delay: 0.15s; }
  main > section:nth-of-type(4) { animation-delay: 0.2s; }
  main > section:nth-of-type(5) { animation-delay: 0.25s; }
  main > section:nth-of-type(n+6) { animation-delay: 0.3s; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  main > section {
    opacity: 1;
  }
}

/* ================= 响应式 ================= */
@media (max-width: 1024px) {
  header > div[role="banner"] {
    gap: 0.6rem 1rem;
  }
  header nav[aria-label="主导航"] a {
    padding: 0.38rem 0.55rem;
    font-size: 0.82rem;
  }
  header form[role="search"] input {
    width: 10rem;
  }
}

@media (max-width: 860px) {
  header > div[role="banner"] {
    flex-wrap: wrap;
    justify-content: space-between;
  }
  header nav[aria-label="主导航"] {
    order: 3;
    flex-basis: 100%;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-bottom: 0.25rem;
  }
  header nav[aria-label="主导航"]::-webkit-scrollbar {
    display: none;
  }
  header nav[aria-label="主导航"] ul {
    flex-wrap: nowrap;
    width: max-content;
  }
  header form[role="search"] {
    margin-left: auto;
  }
  main {
    gap: 1.1rem;
  }
  main > section {
    border-radius: var(--radius-md);
  }
}

@media (max-width: 640px) {
  html {
    scroll-padding-top: 120px;
  }
  body {
    font-size: 15px;
    background-attachment: scroll;
  }
  header > div[role="banner"] {
    padding: 0.7rem 1rem;
  }
  header > div[role="banner"] > a[aria-label="甜橘剧场首页"] {
    font-size: 1.15rem;
    padding-left: 1.7rem;
  }
  header form[role="search"] {
    flex: 1 1 100%;
    order: 2;
  }
  header form[role="search"] input {
    width: 100%;
    flex: 1;
  }
  header nav[aria-label="主导航"] {
    order: 4;
  }
  #hero {
    padding: 1.35rem 1.1rem;
    border-radius: var(--radius-md);
  }
  #hero h1 {
    max-width: none;
  }
  #hero figure {
    margin: 1.1rem 0;
  }
  main > section {
    padding: 1.15rem 1rem;
  }
  main > section > h2 {
    padding-left: 0.95rem;
  }
  main > nav[aria-label="页内锚点导航"] {
    padding: 1rem;
  }
  main > nav[aria-label="页内锚点导航"] ul {
    gap: 0.4rem;
  }
  main > nav[aria-label="页内锚点导航"] a {
    font-size: 0.78rem;
    padding: 0.3rem 0.7rem;
  }
  #products > h3,
  #advantages > h3,
  #solutions > h3,
  #applications > h3,
  #cases > h3 {
    padding: 0.75rem 0.85rem;
    font-size: 1.05rem;
  }
  #products > h3 + p,
  #advantages > h3 + p,
  #solutions > h3 + p,
  #applications > h3 + p,
  #cases > h3 + p {
    padding-left: 1rem;
  }
  #howto ol li {
    padding: 0.8rem 0.9rem 0.8rem 3rem;
  }
  #howto ol li::before {
    left: 0.8rem;
    width: 1.5rem;
    height: 1.5rem;
    font-size: 0.78rem;
  }
  #faq summary {
    padding: 0.85rem 2.6rem 0.85rem 0.95rem;
    font-size: 0.9rem;
  }
  #faq details p {
    padding: 0 0.95rem 0.9rem;
  }
  #reviews blockquote {
    padding: 1rem 1rem 1rem 2.6rem;
  }
  #reviews blockquote::before {
    left: 0.7rem;
    font-size: 2.4rem;
  }
  #contact address {
    padding: 1rem;
  }
  footer > nav[aria-label="页脚导航"] ul {
    gap: 0.4rem 1rem;
  }
}

@media (max-width: 380px) {
  header > div[role="banner"] > a[aria-label="甜橘剧场首页"] {
    font-size: 1.02rem;
  }
  header form[role="search"] button {
    padding: 0.5rem 0.8rem;
  }
}

/* ================= 打印 ================= */
@media print {
  header,
  footer,
  main > nav,
  #hero figure {
    display: none;
  }
  body {
    background: #fff;
    color: #000;
  }
  main > section {
    box-shadow: none;
    border: 1px solid #ccc;
    page-break-inside: avoid;
  }
  a {
    color: #000;
    text-decoration: underline;
  }
}