/* ==========================================================================
   铭赞网络 Bing 推广 · 全局样式
   ========================================================================== */

:root {
  --c-primary: #0078d4;
  --c-primary-deep: #005a9e;
  --c-accent: #00b7c3;
  --c-gold: #f2a900;
  --c-dark: #0b1220;
  --c-dark-2: #121a2e;
  --c-dark-3: #1b2440;
  --c-line: rgba(255, 255, 255, 0.08);
  --c-text: #1a2333;
  --c-text-2: #4a5568;
  --c-text-3: #6b7488;
  --c-bg: #ffffff;
  --c-bg-alt: #f5f8fc;
  --c-bg-soft: #f0f4f9;
  --c-border: #e5eaf1;

  --shadow-sm: 0 2px 8px rgba(0, 40, 90, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 40, 90, 0.08);
  --shadow-lg: 0 20px 50px rgba(0, 40, 90, 0.12);
  --shadow-glow: 0 12px 40px rgba(0, 120, 212, 0.25);

  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 22px;
  --radius-xl: 28px;

  --maxw: 1240px;
  --gutter: 24px;

  --font-display:
    "Plus Jakarta Sans", "Noto Serif SC", "Microsoft YaHei", sans-serif;
  --font-body:
    "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;

  --t-fast: 0.2s cubic-bezier(0.4, 0.2, 0.2, 1);
  --t-base: 0.35s cubic-bezier(0.4, 0.2, 0.2, 1);
  --t-slow: 0.6s cubic-bezier(0.4, 0.2, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--t-fast);
}
a:hover {
  color: var(--c-primary);
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: 0;
  background: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  color: var(--c-dark);
  margin: 0 0 0.4em;
  line-height: 1.2;
  font-weight: 700;
}

p {
  margin: 0 0 1em;
  color: var(--c-text-2);
}

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

::selection {
  background: rgba(0, 120, 212, 0.18);
  color: var(--c-dark);
}

/* ==========================================================================
   Header · LOGO + Nav + Hero 一体化
   ========================================================================== */

.site-header {
  position: relative;
  background:
    radial-gradient(
      1200px 600px at 80% -10%,
      rgba(0, 183, 195, 0.35),
      transparent 60%
    ),
    radial-gradient(
      900px 500px at 10% 10%,
      rgba(0, 120, 212, 0.45),
      transparent 60%
    ),
    linear-gradient(180deg, #0b1220 0%, #0e1a33 100%);
  color: #fff;
  overflow: hidden;
  padding-bottom: 80px;
}

.header-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(
    ellipse 80% 60% at 50% 30%,
    #000 30%,
    transparent 80%
  );
  -webkit-mask-image: radial-gradient(
    ellipse 80% 60% at 50% 30%,
    #000 30%,
    transparent 80%
  );
}
.aurora {
  position: absolute;
  inset: -10% -10% auto -10%;
  height: 60%;
  background:
    radial-gradient(
      40% 50% at 20% 30%,
      rgba(0, 183, 195, 0.35),
      transparent 70%
    ),
    radial-gradient(
      35% 45% at 80% 20%,
      rgba(0, 120, 212, 0.45),
      transparent 70%
    );
  filter: blur(40px);
  opacity: 0.8;
  animation: auroraMove 12s ease-in-out infinite alternate;
}
@keyframes auroraMove {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  100% {
    transform: translate3d(2%, -1%, 0) scale(1.05);
  }
}

.header-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-top: 24px;
  padding-bottom: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  flex-shrink: 0;
}
.logo:hover {
  color: #fff;
}

.logo-mark { display: inline-flex; }
.logo-mark svg { display: block; }

.logo-text {
    display: flex;
    align-items: baseline;
    gap: 8px;
    font-family: var(--font-display);
    white-space: nowrap;
}
.logo-name {
    font-size: 20px;
    font-weight: 800;
    color: #fff;
    letter-spacing: 0.5px;
    position: relative;
}
.logo-r {
  color: var(--c-gold);
  font-size: 12px;
  margin-left: 2px;
  font-weight: 600;
  vertical-align: super;
}
.logo-sep {
  color: rgba(255, 255, 255, 0.35);
  font-size: 20px;
}
.logo-key {
    font-size: 16px;
    font-weight: 600;
    background: linear-gradient(90deg, #00E0C7, #76D5FF);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    letter-spacing: 0.5px;
}

.nav {
  flex: 1;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-wrap: nowrap;
}
.nav-list a {
    color: rgba(255,255,255,0.78);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 11px;
    border-radius: 999px;
    transition: all var(--t-fast);
    position: relative;
    white-space: nowrap;
}
.nav-list a:hover,
.nav-list a.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition:
    transform var(--t-base),
    opacity var(--t-base);
}
.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 */
.hero {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  padding-top: 56px;
  padding-bottom: 32px;
}

.hero-text {
  color: #fff;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(0, 224, 199, 0.12);
  border: 1px solid rgba(0, 224, 199, 0.3);
  color: #7defe6;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
  letter-spacing: 0.3px;
}
.eyebrow .dot {
  width: 6px;
  height: 6px;
  background: #00e0c7;
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(0, 224, 199, 0.2);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.4;
  }
}

.hero-title {
  font-size: clamp(34px, 4.4vw, 56px);
  line-height: 1.12;
  color: #fff;
  font-weight: 800;
  margin-bottom: 22px;
  letter-spacing: -0.5px;
}
.title-gradient {
  background: linear-gradient(90deg, #00e0c7 0%, #76d5ff 50%, #b89eff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-sub {
  color: rgba(255, 255, 255, 0.78);
  font-size: 17px;
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 620px;
}
.hero-sub strong {
  color: #7defe6;
  font-weight: 600;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 44px;
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 26px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: all var(--t-base);
  cursor: pointer;
  white-space: nowrap;
  border: 1px solid transparent;
}
.cta-primary {
  background: linear-gradient(90deg, #00b7c3, #0078d4);
  color: #fff;
  box-shadow: 0 10px 30px rgba(0, 120, 212, 0.45);
}
.cta-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 40px rgba(0, 120, 212, 0.55);
  color: #fff;
}
.cta-outline {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
}
.cta-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}
.cta-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.12);
  padding: 10px 18px;
  font-size: 14px;
  border-radius: 10px;
}
.cta-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}
.cta-block {
  width: 100%;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  padding: 22px 26px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  max-width: 620px;
}
.hero-stats li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.hero-stats strong {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
}
.hero-stats strong small {
  font-size: 14px;
  color: #7defe6;
  margin-left: 2px;
}
.hero-stats span {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.6);
}

/* Hero Visual */
.hero-visual {
  position: relative;
  height: 460px;
}
.hv-card {
  position: absolute;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 18px 20px;
  color: #fff;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  animation: floaty 6s ease-in-out infinite;
}

.hv-card-1 {
  top: 0;
  left: 0;
  width: 280px;
  animation-delay: 0s;
}
.hv-card-2 {
  top: 110px;
  right: 0;
  width: 240px;
  animation-delay: 1.2s;
}
.hv-card-3 {
  bottom: 0;
  left: 30px;
  width: 320px;
  animation-delay: 2.4s;
}

@keyframes floaty {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

.hv-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}
.hv-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.hv-dot-1 {
  background: #00e0c7;
  box-shadow: 0 0 0 4px rgba(0, 224, 199, 0.2);
}
.hv-text {
  color: rgba(255, 255, 255, 0.85);
  font-weight: 500;
}
.hv-progress {
  margin: 14px 0 12px;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
  overflow: hidden;
}
.hv-progress span {
  display: block;
  height: 100%;
  width: 72%;
  background: linear-gradient(90deg, #00e0c7, #76d5ff);
  border-radius: 999px;
  animation: progress 3.5s ease-in-out infinite;
}
@keyframes progress {
  0% {
    width: 30%;
  }
  60% {
    width: 90%;
  }
  100% {
    width: 30%;
  }
}
.hv-meta {
  display: flex;
  justify-content: space-between;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.55);
}
.hv-meta .ok {
  color: #7defe6;
}

.hv-title {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 4px;
}
.hv-num {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 8px;
}
.hv-num small {
  font-size: 16px;
  color: #00e0c7;
  margin-left: 4px;
}
.hv-spark {
  width: 100%;
  height: 36px;
}

.kv {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
  font-size: 13.5px;
}
.kv:last-child {
  border-bottom: 0;
}
.kv .k {
  color: rgba(255, 255, 255, 0.6);
}
.kv strong {
  color: #fff;
  font-weight: 600;
}
.kv .ok {
  color: #00e0c7;
}

.header-divider {
  position: relative;
  z-index: 1;
  height: 80px;
  margin-top: -80px;
  background: linear-gradient(180deg, transparent 0%, #fff 100%);
  pointer-events: none;
}

/* ==========================================================================
   Section 通用
   ========================================================================== */

.section {
  padding: 96px 0;
  position: relative;
}
.section-alt {
  background: var(--c-bg-alt);
}
.section-dark {
  background: linear-gradient(180deg, #0b1220, #121a2e);
  color: #fff;
}
.section-dark p {
  color: rgba(255, 255, 255, 0.7);
}

.section-head {
  max-width: 820px;
  margin: 0 auto 56px;
  text-align: center;
}
.section-head.light h2 {
  color: #fff;
}
.section-head.light p {
  color: rgba(255, 255, 255, 0.7);
}

.kicker {
  display: inline-block;
  padding: 6px 14px;
  margin-bottom: 16px;
  background: rgba(0, 120, 212, 0.08);
  color: var(--c-primary);
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.section-head.light .kicker {
  background: rgba(0, 224, 199, 0.12);
  color: #7defe6;
}

.section-head h2 {
  font-size: clamp(28px, 3.2vw, 40px);
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}
.section-desc {
  font-size: 16px;
  color: var(--c-text-2);
  line-height: 1.75;
}
.section-desc .link {
  color: var(--c-primary);
  font-weight: 500;
  border-bottom: 1px solid rgba(0, 120, 212, 0.3);
}

/* ==========================================================================
   业务卡片
   ========================================================================== */

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 120, 212, 0.04), transparent 60%);
  opacity: 0;
  transition: opacity var(--t-base);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0, 120, 212, 0.2);
}
.card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(
    135deg,
    rgba(0, 120, 212, 0.1),
    rgba(0, 183, 195, 0.1)
  );
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.card h3 {
  font-size: 20px;
  margin-bottom: 10px;
}
.card p {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--c-text-2);
  margin-bottom: 16px;
}
.card-list {
  border-top: 1px dashed var(--c-border);
  padding-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.card-list li {
  font-size: 13.5px;
  color: var(--c-text-3);
  padding-left: 18px;
  position: relative;
}
.card-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--c-accent);
  border-radius: 50%;
}

/* ==========================================================================
   5 步流程
   ========================================================================== */

.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  position: relative;
  counter-reset: process;
}
.process::before {
  content: "";
  position: absolute;
  top: 38px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(0, 120, 212, 0.2),
    rgba(0, 183, 195, 0.2),
    transparent
  );
  z-index: 0;
}
.process li {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 0 8px;
}
.process-num {
  width: 78px;
  height: 78px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid rgba(0, 120, 212, 0.2);
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 24px;
  transition: all var(--t-base);
  box-shadow: 0 6px 20px rgba(0, 120, 212, 0.1);
}
.process li:hover .process-num {
  background: linear-gradient(135deg, #0078d4, #00b7c3);
  color: #fff;
  transform: scale(1.08);
  box-shadow: 0 12px 30px rgba(0, 120, 212, 0.3);
}
.process h3 {
  font-size: 17px;
  margin-bottom: 6px;
}
.process p {
  font-size: 13.5px;
  color: var(--c-text-3);
  line-height: 1.65;
  margin: 0;
}

/* ==========================================================================
   投放优势
   ========================================================================== */

.adv {
  padding: 28px 24px;
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  transition: all var(--t-base);
  position: relative;
}
.adv:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 183, 195, 0.3);
}
.adv-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  margin-bottom: 16px;
}
.adv h3 {
  font-size: 17px;
  margin-bottom: 8px;
}
.adv p {
  font-size: 13.5px;
  color: var(--c-text-3);
  line-height: 1.65;
  margin: 0;
}

/* ==========================================================================
   行业经验
   ========================================================================== */

.exp {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
  position: relative;
}
.exp::before {
  content: "";
  position: absolute;
  top: 60px;
  left: 5%;
  right: 5%;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(0, 224, 199, 0.3),
    transparent
  );
}
.exp-stat {
  text-align: center;
  position: relative;
  z-index: 1;
}
.exp-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 14px;
  background: linear-gradient(135deg, #0078d4, #00b7c3);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16px;
  box-shadow: 0 0 0 6px rgba(0, 120, 212, 0.15);
  transition: transform var(--t-base);
}
.exp-stat:hover .exp-num {
  transform: scale(1.1);
}
.exp-label {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}
.exp-stat p {
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.6;
  margin: 0;
}

/* ==========================================================================
   客户案例
   ========================================================================== */

.case {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.case::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-base);
}
.case:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.case:hover::after {
  transform: scaleX(1);
}
.case-tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 120, 212, 0.08);
  color: var(--c-primary);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 14px;
}
.case h3 {
  font-size: 17px;
  margin-bottom: 8px;
}
.case p {
  font-size: 14px;
  color: var(--c-text-2);
  line-height: 1.7;
  margin-bottom: 16px;
}
.case p strong {
  color: var(--c-primary);
  font-weight: 700;
}
.case-kpi {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  padding-top: 16px;
  border-top: 1px dashed var(--c-border);
}
.case-kpi li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-align: center;
}
.case-kpi span {
  font-size: 12px;
  color: var(--c-text-3);
}
.case-kpi strong {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--c-dark);
  font-weight: 700;
}

/* ==========================================================================
   FAQ 自动展开
   ========================================================================== */

.faq-list {
  max-width: 920px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--t-base);
}
.faq-item.open {
  box-shadow: var(--shadow-md);
  border-color: rgba(0, 120, 212, 0.25);
}
.faq-question {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 22px 24px;
  text-align: left;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 600;
  color: var(--c-dark);
  background: #fff;
  transition: all var(--t-fast);
}
.faq-question:hover {
  color: var(--c-primary);
}

.faq-q-num {
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(
    135deg,
    rgba(0, 120, 212, 0.1),
    rgba(0, 183, 195, 0.1)
  );
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}
.faq-q-text {
  flex: 1;
}
.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0, 120, 212, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    transform var(--t-base),
    background var(--t-base);
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--c-primary);
  border-radius: 2px;
  transition: transform var(--t-base);
}
.faq-icon::before {
  width: 12px;
  height: 2px;
}
.faq-icon::after {
  width: 2px;
  height: 12px;
}
.faq-icon {
  position: relative;
}
.faq-item.open .faq-icon {
  background: var(--c-primary);
}
.faq-item.open .faq-icon::before,
.faq-item.open .faq-icon::after {
  background: #fff;
}
.faq-item.open .faq-icon::after {
  transform: rotate(90deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--t-slow);
}
.faq-item.open .faq-answer {
  max-height: 1000px;
}
.faq-answer-inner {
  padding: 0 24px 22px 70px;
  color: var(--c-text-2);
  font-size: 14.5px;
  line-height: 1.8;
  border-top: 1px dashed var(--c-border);
  margin-top: -2px;
  padding-top: 18px;
}
.faq-answer-inner p {
  margin: 0 0 8px;
}
.faq-answer-inner strong {
  color: var(--c-dark);
  font-weight: 600;
}

/* ==========================================================================
   联系方式
   ========================================================================== */

.contact {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 24px;
}

.contact-card {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}

.qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 18px;
  background: var(--c-bg-soft);
  border-radius: var(--radius);
  margin-bottom: 22px;
}
.qr img {
  width: 200px;
  height: 200px;
  border-radius: 12px;
  background: #fff;
  padding: 6px;
  border: 1px solid var(--c-border);
}
.qr-tip {
  font-size: 13.5px;
  color: var(--c-text-2);
  font-weight: 500;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.contact-list li {
  display: flex;
  align-items: center;
  gap: 14px;
}
.ci {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(
    135deg,
    rgba(0, 120, 212, 0.08),
    rgba(0, 183, 195, 0.08)
  );
  color: var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.cl-label {
  display: block;
  font-size: 12.5px;
  color: var(--c-text-3);
  margin-bottom: 2px;
}
.cl-val {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--c-dark);
}
.cl-val:hover {
  color: var(--c-primary);
}

.contact-form-wrap h3 {
  font-size: 22px;
  margin-bottom: 8px;
}
.form-desc {
  font-size: 14px;
  color: var(--c-text-2);
  margin-bottom: 22px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.contact-form label.full {
  width: 100%;
}
.contact-form label > span {
  font-size: 13px;
  color: var(--c-text-2);
  font-weight: 500;
}
.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--c-border);
  border-radius: 10px;
  font-family: inherit;
  font-size: 14.5px;
  color: var(--c-text);
  background: #fff;
  transition: all var(--t-fast);
  -webkit-appearance: none;
  appearance: none;
}
.contact-form select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236B7488' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><polyline points='6 9 12 15 18 9'/></svg>");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  padding-right: 36px;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: 0;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 4px rgba(0, 120, 212, 0.12);
}
.contact-form textarea {
  resize: vertical;
  min-height: 96px;
}

.form-tip {
  margin: 0;
  font-size: 13px;
  color: var(--c-text-3);
  min-height: 1.4em;
}
.form-tip.ok {
  color: #00875a;
}
.form-tip.err {
  color: #c0392b;
}

/* ==========================================================================
   子业务矩阵
   ========================================================================== */

.matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.mx-col {
  background: #fff;
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 22px 20px;
  transition: all var(--t-base);
}
.mx-col:hover {
  border-color: rgba(0, 120, 212, 0.2);
  box-shadow: var(--shadow-sm);
}
.mx-col h4 {
  font-size: 14px;
  color: var(--c-primary);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-border);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}
.mx-col h4::before {
  content: "";
  width: 4px;
  height: 16px;
  background: linear-gradient(180deg, var(--c-primary), var(--c-accent));
  border-radius: 2px;
}
.mx-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.mx-col li a {
  font-size: 13.5px;
  color: var(--c-text-2);
  transition: all var(--t-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.mx-col li a::before {
  content: "›";
  color: var(--c-accent);
  font-weight: 700;
  transition: transform var(--t-fast);
}
.mx-col li a:hover {
  color: var(--c-primary);
}
.mx-col li a:hover::before {
  transform: translateX(2px);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: linear-gradient(180deg, #0b1220 0%, #06101f 100%);
  color: rgba(255, 255, 255, 0.75);
  padding: 64px 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo .logo-name,
.footer-brand .logo .logo-key {
  color: #fff;
}
.footer-brand .logo .logo-key {
  background: linear-gradient(90deg, #00e0c7, #76d5ff);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.footer-desc {
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.6);
  margin: 16px 0 18px;
}
.footer-contact-mini {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}
.footer-contact-mini a:hover {
  color: #00e0c7;
}

.footer-mx {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.footer-mx .mx-col {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.06);
  padding: 16px 14px;
}
.footer-mx .mx-col h4 {
  color: #7defe6;
  border-bottom-color: rgba(255, 255, 255, 0.08);
  font-size: 13px;
  margin-bottom: 12px;
  padding-bottom: 8px;
}
.footer-mx .mx-col h4::before {
  background: linear-gradient(180deg, #00e0c7, #76d5ff);
}
.footer-mx .mx-col li a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 12.5px;
}
.footer-mx .mx-col li a:hover {
  color: #fff;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding-top: 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}
.footer-bottom a {
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.2);
  padding-bottom: 1px;
}
.footer-bottom a:hover {
  color: #fff;
  border-bottom-color: rgba(255, 255, 255, 0.6);
}
.footer-bull a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-bull img {
  display: inline-block;
}

/* ==========================================================================
   悬浮按钮
   ========================================================================== */

.floating {
  position: fixed;
  right: 24px;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 50;
}
.floating-btn {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #0078d4, #00b7c3);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(0, 120, 212, 0.4);
  transition: all var(--t-base);
  cursor: pointer;
}
.floating-btn:hover {
  transform: translateY(-3px);
  color: #fff;
  box-shadow: 0 12px 32px rgba(0, 120, 212, 0.5);
}
#back-top {
  background: rgba(11, 18, 32, 0.85);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
}
#back-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

/* ==========================================================================
   入场动画
   ========================================================================== */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.7s ease,
    transform 0.7s cubic-bezier(0.4, 0.2, 0.2, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}

/* ==========================================================================
   响应式
   ========================================================================== */

@media (max-width: 1240px) {
    .header-inner { gap: 16px; }
    .nav-list a { padding: 8px 9px; font-size: 13.5px; }
    .cta-ghost { display: none; }
}

@media (max-width: 1100px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .process { grid-template-columns: repeat(3, 1fr); row-gap: 28px; }
    .process::before { display: none; }
    .exp { grid-template-columns: repeat(3, 1fr); }
    .matrix { grid-template-columns: repeat(2, 1fr); }
    .footer-mx { grid-template-columns: repeat(2, 1fr); }
    .footer-top { grid-template-columns: 1fr; }
    .contact { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .nav {
    display: none;
  }
  .nav.open {
    display: block;
    position: absolute;
    top: 100%;
    right: 16px;
    background: rgba(11, 18, 32, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 12px;
    z-index: 100;
    min-width: 200px;
  }
  .nav.open .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }
  .nav.open .nav-list a {
    padding: 12px 16px;
    display: block;
  }
  .nav-toggle {
    display: flex;
  }
  .cta-ghost {
    display: none;
  }
  .header-inner {
    padding-top: 18px;
    padding-bottom: 18px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-top: 32px;
  }
  .hero-visual {
    height: 380px;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .section {
    padding: 64px 0;
  }
  .section-head {
    margin-bottom: 36px;
  }
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .grid-4 {
    grid-template-columns: 1fr;
  }
  .process {
    grid-template-columns: 1fr 1fr;
  }
  .exp {
    grid-template-columns: 1fr 1fr;
  }
  .exp::before {
    display: none;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .matrix {
    grid-template-columns: 1fr;
  }
  .footer-mx {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 18px;
  }
  .hero-title {
    font-size: 32px;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr;
    padding: 18px;
  }
  .process {
    grid-template-columns: 1fr;
  }
  .exp {
    grid-template-columns: 1fr;
  }
  .contact-card {
    padding: 24px 20px;
  }
  .logo-text {
    flex-direction: row;
    gap: 6px;
  }
  .logo-name {
    font-size: 18px;
  }
  .logo-key {
    font-size: 15px;
  }
  .logo-sep {
    font-size: 16px;
  }
  .floating {
    right: 12px;
    bottom: 12px;
  }
  .floating-btn {
    width: 44px;
    height: 44px;
  }
}