/* ============================
   AI 引流网站 - 全局样式
   适配：PC / Mac / Linux / 手机 / 平板 / 折叠屏 / 电视 / 手表 / 眼镜
   ============================ */

:root {
  --bg: #0f172a;
  --bg2: #151d2e;
  --card: #161622;
  --text: #f0f0f5;
  --text2: #a0a0b0;
  --primary: #00f0ff;
  --primary2: #7000ff;
  --accent: #ff2e97;
  --grad: linear-gradient(135deg, #00f0ff 0%, #7000ff 50%, #ff2e97 100%);
  --radius: 18px;
  --shadow: 0 20px 60px rgba(0, 240, 255, 0.12);
  --maxw: 1400px;
}

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

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* 背景光效 */
.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.35;
  z-index: -1;
  animation: float 12s ease-in-out infinite;
}

.orb1 {
  width: 500px;
  height: 500px;
  background: var(--primary);
  top: -120px;
  left: -120px;
}

.orb2 {
  width: 400px;
  height: 400px;
  background: var(--primary2);
  bottom: -80px;
  right: -80px;
  animation-delay: -4s;
}

.orb3 {
  width: 300px;
  height: 300px;
  background: var(--accent);
  top: 40%;
  left: 50%;
  animation-delay: -8s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.08); }
}

/* 头部 */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(30, 41, 59, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

nav {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
}

.logo span {
  -webkit-text-fill-color: #fff;
}

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

.nav-links a {
  font-size: 0.95rem;
  color: var(--text2);
  transition: color 0.3s;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--grad);
  transition: width 0.3s;
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-btns {
  display: flex;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 24px rgba(112, 0, 255, 0.35);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.menu-toggle {
  display: none;
  font-size: 1.5rem;
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  position: absolute;
  right: 20px;
}

/* Hero */
.hero {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 100px 24px 60px;
  text-align: center;
  position: relative;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: 999px;
  color: var(--primary);
  font-size: 0.85rem;
  margin-bottom: 28px;
}

.badge::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.8rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 28px;
  letter-spacing: 4px;
}

.hero h1 .gradient {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text2);
  max-width: 680px;
  margin: 0 auto 40px;
}

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

/* 搜索 */
.search-box {
  max-width: 680px;
  margin: 40px auto 0;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 18px 60px 18px 24px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 30px rgba(0, 240, 255, 0.12);
}

.search-box button {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: none;
  background: var(--grad);
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
}

/* 分类卡片 */
.section {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 100px 24px 60px;
}

.section:first-of-type {
  padding-top: 80px;
}

.section-title {
  font-size: 1.9rem;
  font-weight: 800;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-sub {
  color: var(--text2);
  margin-bottom: 36px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}

.card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  padding: 28px;
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(0, 240, 255, 0.25);
}

.card:hover::before {
  transform: scaleX(1);
}

.card-icon,
.tool-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 18px;
  background: rgba(0, 240, 255, 0.08);
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.card p {
  color: var(--text2);
  font-size: 0.95rem;
  margin-bottom: 18px;
}

.card .meta {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
}

/* 引流文章列表 */
.article-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.article-card {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.article-card .cover {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: linear-gradient(135deg, #1a1a2e, #252538);
}

.article-card .body {
  padding: 22px;
}

.article-card .tag {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(0, 240, 255, 0.08);
  color: var(--primary);
  border-radius: 6px;
  font-size: 0.75rem;
  margin-bottom: 10px;
}

.article-card h4 {
  font-size: 1.1rem;
  margin-bottom: 10px;
  line-height: 1.4;
}

.article-card .summary {
  color: var(--text2);
  font-size: 0.9rem;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card .footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text2);
  font-size: 0.8rem;
}

.views {
  display: flex;
  align-items: center;
  gap: 5px;
}

.views::before {
  content: "👁";
  font-size: 0.85rem;
}

/* 客服二维码 */
.contact-strip {
  background: var(--card);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 50px 24px;
}

.contact-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.contact-text h2 {
  font-size: 1.6rem;
  margin-bottom: 10px;
}

.contact-text p {
  color: var(--text2);
}

.qr-group {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.qr-item {
  text-align: center;
}

.qr-item img {
  width: 110px;
  height: 110px;
  border-radius: 14px;
  background: #fff;
  padding: 8px;
  margin-bottom: 8px;
}

.qr-item span {
  font-size: 0.85rem;
  color: var(--text2);
}

/* 页脚 */
footer {
  text-align: center;
  padding: 40px 24px;
  color: var(--text2);
  font-size: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text2);
  transition: color 0.3s;
}

.footer-links a:hover {
  color: var(--primary);
}

/* 表单弹窗 */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: var(--card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  width: 100%;
  max-width: 520px;
  padding: 28px;
  position: relative;
}

.modal h3 {
  font-size: 1.3rem;
  margin-bottom: 20px;
}

.modal label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.9rem;
  color: var(--text2);
}

.modal input,
.modal textarea {
  width: 100%;
  padding: 12px 16px;
  margin-bottom: 16px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
}

.modal textarea {
  min-height: 140px;
  resize: vertical;
}

.modal .close {
  position: absolute;
  top: 18px;
  right: 20px;
  font-size: 1.4rem;
  background: none;
  border: none;
  color: var(--text2);
  cursor: pointer;
}

.slider-track {
  position: relative;
  height: 44px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  margin-bottom: 18px;
  user-select: none;
}

.slider-thumb {
  position: absolute;
  left: 0;
  top: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  font-size: 1rem;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.slider-thumb:active {
  cursor: grabbing;
}

/* 动画 */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 0.8s forwards;
}

@keyframes fadeIn {
  to { opacity: 1; transform: translateY(0); }
}

/* 响应式适配 */
@media (max-width: 1024px) {
  .hero { padding-top: 80px; }
}

@media (max-width: 768px) {
  .nav-links,
  .nav-btns {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 66px;
    left: 0;
    right: 0;
    background: var(--bg2);
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .hero { padding-top: 60px; }

  .contact-inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  html { font-size: 15px; }
  .card { padding: 22px; }
  .qr-group { justify-content: center; }
}

/* 折叠屏 / 手表 / 超小屏 */
@media (max-width: 360px) {
  .hero h1 { font-size: 1.8rem; }
  .grid { grid-template-columns: 1fr; }
}

/* 横屏 / 带鱼屏 / 电视 */
@media (min-width: 2560px) {
  :root { --maxw: 1800px; }
  html { font-size: 18px; }
}

@media (min-aspect-ratio: 21/9) {
  .hero { padding-top: 120px; }
}

/* 减少动画偏好 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}