/* ============================================================
   铭赞网络 · 短视频矩阵营销 官网样式
   配色:深空蓝 #0B1736 / 电光橙 #FF6A1A / 钛白 #F5F7FA
   字体:Noto Serif SC(标题) / Noto Sans SC(正文) / Inter(数字)
   ============================================================ */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --c-bg: #ffffff;
  --c-bg-soft: #f5f7fa;
  --c-bg-dark: #0b1736;
  --c-bg-darker: #060f24;
  --c-ink: #0e1530;
  --c-ink-2: #2a324b;
  --c-muted: #5e6680;
  --c-line: #e5e8f0;
  --c-line-2: #d8dce6;
  --c-brand: #ff6a1a;
  --c-brand-2: #ff8a4a;
  --c-brand-soft: #fff2e8;
  --c-accent: #1f4dff;
  --c-red: #e63946;

  --c-on-dark: #ffffff;
  --c-on-dark-muted: rgba(255,255,255,.72);
  --c-on-dark-line: rgba(255,255,255,.12);

  --radius-s: 6px;
  --radius-m: 10px;
  --radius-l: 16px;
  --radius-xl: 24px;

  --shadow-s: 0 4px 16px rgba(11,23,54,.06);
  --shadow-m: 0 14px 40px rgba(11,23,54,.10);
  --shadow-l: 0 30px 80px rgba(11,23,54,.18);

  --font-cn: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --font-num: "Inter", "Noto Sans SC", sans-serif;

  --max-w: 1240px;
  --pad: 24px;

  --ease: cubic-bezier(.2,.7,.2,1);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img,svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--c-brand); }
button { font: inherit; cursor: pointer; background: none; border: 0; color: inherit; }
ul,ol { list-style: none; padding: 0; margin: 0; }
h1,h2,h3,h4,h5,h6 { margin: 0; font-weight: 700; line-height: 1.3; }

/* ---------- 3. 通用 ---------- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad);
  width: 100%;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-cn);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: var(--c-brand);
  margin: 0 0 14px;
  padding: 6px 14px;
  background: var(--c-brand-soft);
  border-radius: 999px;
}
.kicker::before { content:""; width:6px; height:6px; border-radius:50%; background: var(--c-brand); }
.kicker.light {
  color: #ffb37a;
  background: rgba(255,106,26,.14);
}
.kicker.light::before { background: var(--c-brand); }

.section-title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.25;
  color: var(--c-ink);
  letter-spacing: -.01em;
  margin: 0 0 16px;
}
.section-title em {
  font-style: normal;
  color: var(--c-brand);
  background: linear-gradient(180deg, transparent 60%, rgba(255,106,26,.18) 60%);
  padding: 0 4px;
}
.section-sub {
  font-size: 16px;
  color: var(--c-muted);
  max-width: 720px;
  margin: 0;
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-head .kicker { margin: 0 auto 14px; }
.section-head .section-sub { margin: 0 auto; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-s);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease);
  position: relative;
  overflow: hidden;
}
.btn svg { width: 18px; height: 18px; transition: transform .25s var(--ease); }
.btn-primary {
  background: var(--c-brand);
  color: #fff;
  box-shadow: 0 12px 28px -8px rgba(255,106,26,.6);
}
.btn-primary:hover {
  background: #ff5a08;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 18px 36px -8px rgba(255,106,26,.7);
}
.btn-primary:hover svg { transform: translateX(4px); }
.btn-ghost {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,.4);
}
.btn-ghost:hover {
  background: rgba(255,255,255,.1);
  color: #fff;
  border-color: #fff;
}

/* ---------- 4. Hero (导航 + Banner 一体) ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 24px 0 80px;
  background: var(--c-bg-dark);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
  display: flex;
  flex-direction: column;
}
.hero-bg {
  position: absolute; inset: 0;
  z-index: -1;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(255,106,26,.28), transparent 60%),
    radial-gradient(900px 500px at -10% 30%, rgba(31,77,255,.22), transparent 60%),
    linear-gradient(180deg, #0b1736 0%, #060f24 100%);
}
.hero-bg .blob {
  position: absolute;
  width: 540px; height: 540px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: .55;
  animation: float 14s ease-in-out infinite;
}
.blob-1 { top: -120px; right: -100px; background: radial-gradient(circle, #ff6a1a, transparent 60%); }
.blob-2 { top: 40%; left: -180px; background: radial-gradient(circle, #1f4dff, transparent 60%); animation-delay: -4s; }
.blob-3 { bottom: -200px; right: 30%; background: radial-gradient(circle, #ff8a4a, transparent 60%); animation-delay: -8s; }
@keyframes float {
  0%,100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(40px,-30px) scale(1.05); }
}
.grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 80%);
}

.topnav {
  position: relative;
  z-index: 20;
  padding: 16px 0;
}
.topnav.scrolled {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: rgba(11,23,54,.78);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid rgba(255,255,255,.08);
  padding: 10px 0;
  animation: drop .3s var(--ease);
}
@keyframes drop { from { transform: translateY(-100%); } to { transform: translateY(0); } }

.nav-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: nowrap;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  flex: 0 0 auto;
}
.brand:hover { color: #fff; }

.brand-mark { display: flex; flex-direction: column; line-height: 1.05; }
.brand-cn {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 900;
  color: #ffd24a;
  letter-spacing: 2px;
  text-shadow:
    0 0 8px rgba(255,210,74,.5),
    0 0 24px rgba(255,106,26,.35);
  position: relative;
  white-space: nowrap;
}
.r-mark {
  font-size: 11px;
  color: #ffd24a;
  margin-left: 1px;
  vertical-align: super;
  font-weight: 700;
}
.brand-en {
  font-family: var(--font-num);
  font-size: 9px;
  letter-spacing: .25em;
  color: rgba(255,255,255,.55);
  margin-top: 2px;
  font-weight: 500;
  white-space: nowrap;
}
.brand-divider {
  font-size: 20px;
  color: rgba(255,255,255,.4);
  font-weight: 200;
}
.brand-tag {
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  letter-spacing: .04em;
  padding: 6px 12px;
  border: 1px solid rgba(255,210,74,.5);
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(255,210,74,.1), rgba(255,106,26,.05));
  white-space: nowrap;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
  flex-wrap: nowrap;
}
.nav-list a {
  display: inline-block;
  padding: 8px 10px;
  font-size: 14px;
  color: rgba(255,255,255,.78);
  font-weight: 500;
  border-radius: 6px;
  position: relative;
  transition: color .2s var(--ease);
  white-space: nowrap;
  letter-spacing: .02em;
  flex-shrink: 0;
}
.nav-list a::after {
  content:"";
  position: absolute;
  left: 14px; right: 14px; bottom: 4px;
  height: 2px;
  background: var(--c-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
  border-radius: 2px;
}
.nav-list a:hover { color: #fff; }
.nav-list a:hover::after { transform: scaleX(1); }

.nav-phone {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px 8px 12px;
  background: linear-gradient(135deg, rgba(255,106,26,.15), rgba(255,138,74,.1));
  border: 1px solid rgba(255,106,26,.4);
  border-radius: 999px;
  color: #fff;
  margin-left: 6px;
  transition: background .2s var(--ease), transform .2s var(--ease);
  white-space: nowrap;
  flex: 0 0 auto;
}
.nav-phone:hover {
  background: linear-gradient(135deg, rgba(255,106,26,.3), rgba(255,138,74,.2));
  color: #fff;
  transform: translateY(-1px);
}
.nav-phone .ph-icon { width: 18px; height: 18px; color: #ffb37a; }
.nav-phone .ph-text { display: flex; flex-direction: column; line-height: 1.05; }
.nav-phone .ph-text em { font-size: 10px; color: rgba(255,255,255,.55); font-style: normal; letter-spacing: .1em; }
.nav-phone .ph-text strong { font-family: var(--font-num); font-size: 16px; font-weight: 700; }

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  margin-left: auto;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 8px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: #fff; border-radius: 2px;
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.hero-content {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 60px 0 0;
  position: relative;
}

.eyebrow {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .2em;
  color: rgba(255,255,255,.6);
  margin: 0 0 22px;
  padding-left: 38px;
  position: relative;
}
.eyebrow::before {
  content:""; position: absolute; left: 0; top: 50%;
  width: 28px; height: 1px;
  background: var(--c-brand);
}

.hero-title {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(38px, 6.2vw, 84px);
  line-height: 1.12;
  letter-spacing: -.015em;
  margin: 0 0 28px;
}
.hero-title .line {
  display: block;
  opacity: 0;
  transform: translateY(40px);
  animation: rise .9s .15s var(--ease) forwards;
}
.hero-title .line-2 { animation-delay: .35s; }
.hero-title em {
  font-style: normal;
  background: linear-gradient(135deg, #ffd24a, #ff6a1a);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  position: relative;
}
.hero-title em::after {
  content:"";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 6px;
  background: linear-gradient(90deg, #ffd24a, #ff6a1a, transparent);
  border-radius: 3px;
  opacity: .6;
  filter: blur(2px);
}
@keyframes rise { to { opacity: 1; transform: translateY(0); } }

.hero-sub {
  max-width: 700px;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(255,255,255,.78);
  margin: 0 0 40px;
  opacity: 0;
  animation: rise .9s .55s var(--ease) forwards;
}
.hero-sub strong { color: #ffd24a; font-weight: 500; }

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
  opacity: 0;
  animation: rise .9s .75s var(--ease) forwards;
}

.hero-keys {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  opacity: 0;
  animation: rise .9s .9s var(--ease) forwards;
}
.hero-keys li {
  font-size: 13px;
  padding: 6px 14px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 999px;
  color: rgba(255,255,255,.75);
  background: rgba(255,255,255,.04);
  transition: all .25s var(--ease);
}
.hero-keys li:hover {
  background: rgba(255,106,26,.2);
  border-color: rgba(255,106,26,.5);
  color: #fff;
  transform: translateY(-2px);
}

.hero-scroll {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 2px solid rgba(255,255,255,.4);
  border-radius: 14px;
  display: flex; justify-content: center;
  padding-top: 8px;
}
.hero-scroll span {
  width: 3px; height: 8px;
  background: #fff;
  border-radius: 2px;
  animation: scroll 1.6s ease-in-out infinite;
}
@keyframes scroll {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(14px); opacity: 0; }
}

/* ---------- 5. 核心数据 ---------- */
.stats {
  padding: 80px 0;
  background: var(--c-bg-soft);
  border-bottom: 1px solid var(--c-line);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stats-grid li {
  padding: 20px;
  position: relative;
}
.stats-grid li + li::before {
  content:"";
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 1px; height: 40px;
  background: var(--c-line-2);
}
.stats-grid strong {
  display: inline-block;
  font-family: var(--font-num);
  font-size: clamp(48px, 5.5vw, 72px);
  font-weight: 900;
  color: var(--c-ink);
  line-height: 1;
  letter-spacing: -.03em;
  font-feature-settings: "tnum" 1;
}
.stats-grid i {
  font-style: normal;
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 700;
  color: var(--c-brand);
  margin-left: 2px;
  vertical-align: top;
}
.stats-grid p {
  margin: 14px 0 0;
  font-size: 15px;
  color: var(--c-muted);
  letter-spacing: .1em;
}

/* ---------- 6. 关于 ---------- */
.about {
  padding: 120px 0;
  background: #fff;
  position: relative;
  overflow: hidden;
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 80px;
  align-items: center;
}
.about-art {
  position: relative;
  aspect-ratio: 1;
  max-width: 480px;
  margin: 0 auto;
}
.about-svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.about-card {
  position: absolute;
  padding: 20px 24px;
  background: #fff;
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-m);
  min-width: 160px;
  border: 1px solid var(--c-line);
}
.card-1 { top: 8%; left: 0; }
.card-2 { top: 38%; right: 0; }
.card-3 { bottom: 8%; left: 12%; }
.about-card strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 900;
  color: var(--c-ink);
  line-height: 1;
  margin: 6px 0 6px;
}
.about-card p {
  margin: 0;
  font-size: 13px;
  color: var(--c-muted);
  letter-spacing: .1em;
}
.card-dot {
  display: block; width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--c-brand);
  box-shadow: 0 0 0 4px var(--c-brand-soft);
}

.about-text .lead {
  font-size: 17px;
  color: var(--c-ink-2);
  line-height: 1.9;
  margin: 0 0 16px;
}
.about-text .lead strong { color: var(--c-ink); font-weight: 700; }
.about-text .lead em { font-style: normal; color: var(--c-brand); font-weight: 700; }
.about-text p { color: var(--c-muted); margin: 0 0 24px; }
.about-text em { font-style: normal; color: var(--c-ink); font-weight: 700; }

.about-points {
  margin-top: 40px;
  display: grid;
  gap: 20px;
}
.about-points li {
  display: flex;
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--c-line);
}
.about-points li:last-child { border-bottom: 1px solid var(--c-line); }
.ap-num {
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-brand);
  letter-spacing: .1em;
  flex: 0 0 36px;
  padding-top: 2px;
}
.about-points h4 { font-size: 17px; margin: 0 0 6px; color: var(--c-ink); }
.about-points p { font-size: 14px; color: var(--c-muted); margin: 0; line-height: 1.6; }

/* ---------- 7. 服务板块 ---------- */
.services {
  padding: 120px 0;
  background: var(--c-bg-dark);
  color: #fff;
  position: relative;
}
.services::before {
  content:"";
  position: absolute; inset: 0;
  background:
    radial-gradient(800px 400px at 20% 0%, rgba(255,106,26,.18), transparent 60%),
    radial-gradient(700px 500px at 100% 100%, rgba(31,77,255,.15), transparent 60%);
  pointer-events: none;
}
.services .container { position: relative; }
.services .section-title { color: #fff; }
.services .section-sub { color: rgba(255,255,255,.7); }

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.service-card {
  padding: 36px 28px 32px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-l);
  transition: all .35s var(--ease);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content:"";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,106,26,.12), transparent 50%);
  opacity: 0;
  transition: opacity .35s var(--ease);
}
.service-card:hover {
  transform: translateY(-8px);
  border-color: rgba(255,106,26,.4);
  background: rgba(255,255,255,.06);
}
.service-card:hover::before { opacity: 1; }
.sc-icon {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--c-brand), #ff8a4a);
  color: #fff;
  margin-bottom: 24px;
  position: relative;
  box-shadow: 0 12px 24px -6px rgba(255,106,26,.5);
}
.sc-icon svg { width: 28px; height: 28px; }
.service-card h3 {
  font-family: var(--font-serif);
  font-size: 22px;
  margin: 0 0 12px;
  color: #fff;
  position: relative;
}
.service-card p {
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(255,255,255,.7);
  margin: 0 0 20px;
  position: relative;
}
.sc-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
  position: relative;
}
.sc-tags li {
  font-size: 12px;
  padding: 4px 10px;
  background: rgba(255,255,255,.08);
  border-radius: 4px;
  color: rgba(255,255,255,.8);
  border: 1px solid rgba(255,255,255,.08);
}

/* ---------- 8. 流程 ---------- */
.process {
  padding: 120px 0;
  background: var(--c-bg-soft);
}
.process-track {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}
.process-track::before {
  content:"";
  position: absolute;
  top: 36px; left: 12%; right: 12%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-line-2) 10%, var(--c-line-2) 90%, transparent);
  z-index: 0;
}
.process-track li {
  text-align: center;
  padding: 0 12px;
  position: relative;
  z-index: 1;
}
.pt-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 72px; height: 72px;
  border-radius: 50%;
  background: #fff;
  border: 1px solid var(--c-line);
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-brand);
  letter-spacing: .08em;
  margin: 0 auto 24px;
  position: relative;
  transition: all .3s var(--ease);
}
.pt-step::after {
  content: "";
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 2px solid transparent;
  transition: border-color .3s var(--ease);
}
.process-track li:hover .pt-step {
  background: var(--c-brand);
  color: #fff;
  border-color: var(--c-brand);
  transform: scale(1.05);
}
.process-track li:hover .pt-step::after { border-color: var(--c-brand-soft); }
.process-track h4 {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-ink);
  margin: 0 0 10px;
}
.process-track p {
  font-size: 14.5px;
  color: var(--c-muted);
  line-height: 1.6;
  margin: 0;
}

/* ---------- 9. 解决方案 ---------- */
.solutions {
  padding: 120px 0;
  background: #fff;
}
.sol-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 40px;
}
.sol-tab {
  padding: 12px 24px;
  border: 1px solid var(--c-line-2);
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-ink-2);
  background: #fff;
  transition: all .25s var(--ease);
}
.sol-tab:hover {
  border-color: var(--c-brand);
  color: var(--c-brand);
}
.sol-tab.active {
  background: var(--c-ink);
  color: #fff;
  border-color: var(--c-ink);
}
.sol-panels {
  position: relative;
  min-height: 280px;
}
.sol-panel {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 60px;
  align-items: center;
  padding: 48px;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-xl);
  opacity: 0;
  transform: translateY(20px);
  visibility: hidden;
  transition: opacity .4s var(--ease), transform .4s var(--ease), visibility 0s linear .4s;
}
.sol-panel.active {
  position: relative;
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
  transition: opacity .4s var(--ease), transform .4s var(--ease), visibility 0s;
}
.sol-panel h3 {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 900;
  color: var(--c-ink);
  margin: 0 0 18px;
}
.sol-panel > p {
  font-size: 16px;
  color: var(--c-muted);
  line-height: 1.85;
  margin: 0 0 24px;
}
.sol-panel ul { display: grid; gap: 12px; }
.sol-panel li {
  position: relative;
  padding-left: 28px;
  font-size: 15px;
  color: var(--c-ink-2);
}
.sol-panel li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 16px; height: 2px;
  background: var(--c-brand);
  border-radius: 2px;
}

/* ---------- 10. 为什么 ---------- */
.why {
  padding: 120px 0;
  background: var(--c-bg-soft);
}
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.why-grid li {
  padding: 36px 32px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-l);
  transition: all .3s var(--ease);
}
.why-grid li:hover {
  transform: translateY(-6px);
  border-color: var(--c-brand);
  box-shadow: var(--shadow-m);
}
.why-ico {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 14px;
  background: var(--c-brand-soft);
  color: var(--c-brand);
  margin-bottom: 20px;
}
.why-ico svg { width: 28px; height: 28px; }
.why-grid h4 {
  font-size: 20px;
  margin: 0 0 10px;
  color: var(--c-ink);
}
.why-grid p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-muted);
  margin: 0;
}

/* ---------- 11. FAQ ---------- */
.faq {
  padding: 120px 0;
  background: #fff;
}
.faq-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 80px;
  align-items: start;
}
.faq-side { position: sticky; top: 100px; }
.faq-side .section-title em {
  background: linear-gradient(180deg, transparent 60%, rgba(255,106,26,.18) 60%);
}
.faq-side .section-sub { margin-bottom: 32px; }

.faq-list { display: grid; gap: 12px; }
.faq-item {
  border: 1px solid var(--c-line);
  border-radius: var(--radius-m);
  background: #fff;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
  overflow: hidden;
}
.faq-item[open] {
  border-color: var(--c-brand-soft);
  box-shadow: 0 8px 24px -8px rgba(255,106,26,.18);
}
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 16px;
  font-weight: 500;
  color: var(--c-ink);
  position: relative;
  transition: background .2s var(--ease);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: var(--c-bg-soft); }
.q-num {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-brand);
  letter-spacing: .05em;
  flex: 0 0 auto;
  padding: 3px 8px;
  background: var(--c-brand-soft);
  border-radius: 4px;
}
.q-text { flex: 1; }
.q-ico {
  width: 22px; height: 22px;
  flex: 0 0 22px;
  position: relative;
  transition: transform .3s var(--ease);
}
.q-ico::before, .q-ico::after {
  content: "";
  position: absolute;
  background: var(--c-muted);
  border-radius: 1px;
  transition: background .2s var(--ease);
}
.q-ico::before { left: 4px; right: 4px; top: 10px; height: 2px; }
.q-ico::after { top: 4px; bottom: 4px; left: 10px; width: 2px; }
.faq-item[open] .q-ico::after { transform: scaleY(0); }
.faq-item[open] .q-ico::before,
.faq-item[open] summary:hover .q-ico::before { background: var(--c-brand); }

.q-body {
  padding: 0 24px 22px 50px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-muted);
}
.q-body p { margin: 0; }

/* ---------- 12. 联系我们 ---------- */
.contact {
  padding: 120px 0;
  background: var(--c-bg-dark);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.contact::before {
  content:"";
  position: absolute; inset: 0;
  background:
    radial-gradient(900px 500px at 0% 0%, rgba(255,106,26,.15), transparent 60%),
    radial-gradient(700px 500px at 100% 100%, rgba(31,77,255,.12), transparent 60%);
}
.contact .container { position: relative; }
.contact .section-title { color: #fff; }
.contact .section-sub { color: rgba(255,255,255,.7); }

.contact-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 24px;
}

.contact-card {
  padding: 44px 40px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(10px);
}
.cc-label {
  font-size: 12px;
  letter-spacing: .2em;
  color: #ffb37a;
  text-transform: uppercase;
  margin: 0 0 12px;
}
.c-main h3 {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 900;
  margin: 0 0 6px;
  color: #fff;
}
.cc-en {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .15em;
  color: rgba(255,255,255,.5);
  margin: 0 0 32px;
}
.cc-list { display: grid; gap: 18px; }
.cc-list li {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 16px 0;
  border-top: 1px solid rgba(255,255,255,.1);
}
.cc-list li:last-child { border-bottom: 1px solid rgba(255,255,255,.1); }
.cc-ico {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 12px;
  background: rgba(255,106,26,.15);
  color: #ffb37a;
  flex: 0 0 44px;
}
.cc-ico svg { width: 20px; height: 20px; }
.cc-list em {
  display: block;
  font-style: normal;
  font-size: 12px;
  color: rgba(255,255,255,.55);
  letter-spacing: .1em;
  margin-bottom: 4px;
}
.cc-list a {
  font-family: var(--font-num);
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: .02em;
}
.cc-list a:hover { color: var(--c-brand); }

.weibo-link {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
  padding: 18px 20px;
  background: linear-gradient(135deg, rgba(255,210,74,.1), rgba(255,106,26,.08));
  border: 1px solid rgba(255,210,74,.3);
  border-radius: 14px;
  color: #fff;
  transition: all .25s var(--ease);
}
.weibo-link:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, rgba(255,210,74,.18), rgba(255,106,26,.12));
  border-color: rgba(255,210,74,.5);
  color: #fff;
}
.wb-ico {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: var(--c-red);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  flex: 0 0 44px;
}
.wb-ico svg { width: 22px; height: 22px; }
.weibo-link em {
  font-size: 12px;
  color: rgba(255,255,255,.55);
  letter-spacing: .1em;
  display: block;
  margin-bottom: 4px;
  font-style: normal;
}
.weibo-link strong { font-size: 17px; font-weight: 600; }
.weibo-link .go {
  margin-left: auto;
  font-size: 13px;
  padding: 6px 14px;
  background: rgba(255,255,255,.1);
  border-radius: 999px;
}

.c-qr { display: flex; flex-direction: column; align-items: center; text-align: center; }
.qr-frame {
  width: 220px; height: 220px;
  padding: 12px;
  background: #fff;
  border-radius: 16px;
  margin: 8px 0 18px;
  box-shadow: 0 12px 30px -8px rgba(0,0,0,.3);
}
.qr-frame img { width: 100%; height: 100%; object-fit: contain; }
.qr-tip {
  font-size: 16px;
  font-weight: 500;
  color: #fff;
  margin: 0 0 6px;
}
.qr-sub {
  font-size: 12px;
  color: rgba(255,255,255,.55);
  letter-spacing: .1em;
  margin: 0;
}

/* ---------- 13. 友情链接 ---------- */
.links {
  padding: 100px 0;
  background: var(--c-bg-soft);
}
.link-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}
.link-grid li a {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 50px;
  padding: 0 16px;
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: 8px;
  font-size: 14px;
  color: var(--c-ink-2);
  text-align: center;
  transition: all .25s var(--ease);
}
.link-grid li a:hover {
  background: var(--c-ink);
  color: #fff;
  border-color: var(--c-ink);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px -8px rgba(11,23,54,.2);
}

/* ---------- 14. 底部 ---------- */
.site-foot {
  background: var(--c-bg-darker);
  color: rgba(255,255,255,.7);
  padding: 50px 0 30px;
}
.foot-row {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 60px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.foot-brand .brand-cn { font-size: 22px; }
.foot-brand p { font-size: 13px; margin: 8px 0 0; color: rgba(255,255,255,.55); }
.foot-brand .foot-en { font-family: var(--font-num); font-size: 11px; letter-spacing: .15em; }

.foot-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  align-items: center;
  justify-content: flex-end;
}
.foot-meta li { display: flex; flex-direction: column; gap: 4px; }
.foot-meta em {
  font-style: normal;
  font-size: 12px;
  color: rgba(255,255,255,.45);
  letter-spacing: .1em;
}
.foot-meta a {
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  color: #fff;
}

.foot-copy {
  padding-top: 24px;
  text-align: center;
}
.foot-copy p {
  margin: 0;
  font-size: 13px;
  color: rgba(255,255,255,.45);
  line-height: 1.8;
}
.foot-copy a {
  color: rgba(255,255,255,.7);
  border-bottom: 1px solid rgba(255,255,255,.2);
  padding-bottom: 1px;
}
.foot-copy a:hover { color: #ffb37a; border-color: #ffb37a; }

/* ---------- 15. 滚动入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1024px) {
  .nav-list { display: none; position: absolute; top: 100%; left: 0; right: 0; background: rgba(11,23,54,.98); backdrop-filter: blur(20px); flex-direction: column; padding: 12px var(--pad) 24px; gap: 0; border-top: 1px solid rgba(255,255,255,.08); }
  .nav-list.open { display: flex; }
  .nav-list a { padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.06); border-radius: 0; font-size: 15px; }
  .nav-list a::after { display: none; }
  .nav-toggle { display: flex; }
  .nav-phone { display: none; }
  .nav-phone.mobile-show { display: inline-flex; margin: 16px 0 0; }
  .nav-list.open .nav-phone.mobile-show { display: inline-flex; }

  .about-grid, .faq-grid, .contact-grid { grid-template-columns: 1fr; gap: 60px; }
  .faq-side { position: static; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .process-track { grid-template-columns: repeat(2, 1fr); gap: 40px 0; }
  .process-track::before { display: none; }
  .sol-panel { grid-template-columns: 1fr; gap: 24px; padding: 36px; }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid li + li::before { display: none; }
  .link-grid { grid-template-columns: repeat(4, 1fr); }
  .foot-row { grid-template-columns: 1fr; gap: 30px; }
  .foot-meta { justify-content: flex-start; }
}

@media (max-width: 720px) {
  :root { --pad: 18px; }
  .hero { padding: 16px 0 60px; }
  .brand-cn { font-size: 22px; }
  .brand-en { font-size: 8px; }
  .brand-tag { font-size: 12px; padding: 4px 10px; }
  .nav-inner { gap: 10px; flex-wrap: wrap; }
  .topnav { padding: 10px 0; }
  .topnav.scrolled { padding: 8px 0; }
  .hero-content { padding: 40px 0 0; }
  .hero-sub { font-size: 15px; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .hero-cta .btn { justify-content: center; }

  .stats, .about, .services, .process, .solutions, .why, .faq, .contact, .links { padding: 70px 0; }
  .section-head { margin-bottom: 40px; }

  .service-grid { grid-template-columns: 1fr; }
  .process-track { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .stats-grid strong { font-size: 44px; }
  .link-grid { grid-template-columns: repeat(2, 1fr); }

  .contact-card { padding: 32px 24px; }
  .c-main h3 { font-size: 22px; }
  .cc-list a { font-size: 16px; }
  .qr-frame { width: 180px; height: 180px; }

  .about-art { max-width: 320px; }
  .card-1, .card-3 { left: 0; }
  .card-2 { right: 0; }
  .about-card { min-width: 130px; padding: 16px 20px; }
  .about-card strong { font-size: 24px; }

  .sol-tabs { gap: 6px; }
  .sol-tab { padding: 10px 16px; font-size: 13px; }
  .sol-panel h3 { font-size: 22px; }
}

@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .hero-title .line, .hero-sub, .hero-cta, .hero-keys { animation: none; opacity: 1; transform: none; }
}