/* ========================================
   四虎 - 原创样式表
   品牌：四虎 | 域名：151826.cn
   配色：深紫黑+活力橙+薄荷绿
   ======================================== */

/* CSS Reset & Base */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Helvetica Neue', Arial, sans-serif;
  background: #0D0D1A;
  color: #E8E8F0;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: #FF6B35; text-decoration: none; transition: color .3s; }
a:hover { color: #00D4AA; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: #FFFFFF; }

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }
.i4kj5im9 {
  text-align: center;
  margin-bottom: 40px;
  font-size: 2rem;
  position: relative;
  padding-bottom: 15px;
}
.i4kj5im9::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, #FF6B35, #00D4AA);
  border-radius: 2px;
}
.rj6fmm {
  text-align: center;
  color: #B8B8D0;
  max-width: 700px;
  margin: -20px auto 40px;
  font-size: .95rem;
}

/* ========== Header ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(13, 13, 26, .92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.06);
  transition: background .3s;
}
.ogxj0 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.r6bnov { display: flex; align-items: center; gap: 10px; }
.r6bnov img { height: 42px; width: auto; }
.r6bnov span { font-size: 1.4rem; font-weight: 800; background: linear-gradient(135deg, #FF6B35, #00D4AA); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }

/* Navigation */
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: .9rem;
  color: #B8B8D0;
  transition: all .3s;
  white-space: nowrap;
}
.main-nav a:hover, .main-nav a.active {
  color: #FF6B35;
  background: rgba(255, 107, 53, .1);
}
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}
.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: #E8E8F0;
  border-radius: 2px;
  transition: all .3s;
}

/* Search Bar */
.g7f1ye {
  background: rgba(30, 30, 58, .8);
  border-bottom: 1px solid rgba(255,255,255,.04);
  padding: 12px 0;
  margin-top: 68px;
}
.gj0ebh {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
}
.g7f1ye input {
  width: 100%;
  padding: 10px 45px 10px 18px;
  border: 1px solid rgba(255,107,53,.3);
  border-radius: 25px;
  background: rgba(13, 13, 26, .6);
  color: #E8E8F0;
  font-size: .9rem;
  outline: none;
  transition: border-color .3s;
}
.g7f1ye input:focus { border-color: #FF6B35; }
.g7f1ye input::placeholder { color: #666680; }
.g7f1ye button {
  position: absolute;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #FF6B35;
  font-size: 1.1rem;
  cursor: pointer;
}

/* ========== Hero Banner ========== */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #1A0A2E 0%, #0D0D1A 50%, #0A1628 100%);
}
.wmc164x {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: .35;
  filter: blur(1px);
}
.eomk32aj {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 20px 60px;
  width: 100%;
}
.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #FFFFFF 0%, #FF6B35 50%, #00D4AA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero h2 { font-size: 1.3rem; color: #B8B8D0; font-weight: 400; margin-bottom: 30px; }
.ezbhs6 { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.ezbhs6 span {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: .8rem;
  background: rgba(255,107,53,.12);
  color: #FF6B35;
  border: 1px solid rgba(255,107,53,.25);
}
.fpkja6cb {
  display: inline-block;
  padding: 12px 32px;
  background: linear-gradient(135deg, #FF6B35, #FF8F5E);
  color: #fff;
  border-radius: 30px;
  font-weight: 600;
  font-size: .95rem;
  transition: all .3s;
  border: none;
  cursor: pointer;
}
.fpkja6cb:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(255,107,53,.35); color: #fff; }
.a7mbxi {
  display: inline-block;
  padding: 12px 32px;
  border: 1px solid #00D4AA;
  color: #00D4AA;
  border-radius: 30px;
  font-weight: 600;
  font-size: .95rem;
  transition: all .3s;
  margin-left: 12px;
}
.a7mbxi:hover { background: rgba(0,212,170,.1); color: #00D4AA; }

/* ========== Video Cards Grid ========== */
.y5kgh {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.video-card {
  background: #1E1E3A;
  border-radius: 12px;
  overflow: hidden;
  transition: all .35s;
  border: 1px solid rgba(255,255,255,.04);
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 35px rgba(0,0,0,.4);
  border-color: rgba(255,107,53,.2);
}
.z07u8fyi {
  position: relative;
  padding-top: 56.25%;
  overflow: hidden;
}
.z07u8fyi img,
.z07u8fyi video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s;
}
.z07u8fyi video { z-index: 0; }
.z07u8fyi .v3w7l { z-index: 1; }
.video-card:hover .z07u8fyi img { transform: scale(1.08); }
.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(.8);
  width: 56px;
  height: 56px;
  background: rgba(255,107,53,.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all .35s;
}
.play-btn::after {
  content: '';
  display: block;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 3px;
}
.video-card:hover .play-btn { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.qbty9q {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,.75);
  color: #fff;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: .75rem;
}
.ucz3hn { padding: 14px; }
.ucz3hn h4 {
  font-size: .92rem;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}
.ytjnsc4n {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: .78rem;
  color: #888;
}
.ytjnsc4n span { display: flex; align-items: center; gap: 4px; }
.u9h3f7ft { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.u9h3f7ft span {
  font-size: .7rem;
  padding: 2px 8px;
  border-radius: 10px;
  background: rgba(0,212,170,.1);
  color: #00D4AA;
}

/* ========== Service Cards ========== */
.i03no6 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pypy7cm {
  background: linear-gradient(145deg, #1E1E3A, #161630);
  border-radius: 16px;
  padding: 30px;
  text-align: center;
  transition: all .35s;
  border: 1px solid rgba(255,255,255,.04);
}
.pypy7cm:hover {
  transform: translateY(-5px);
  border-color: rgba(255,107,53,.2);
  box-shadow: 0 10px 30px rgba(0,0,0,.3);
}
.wabh0 {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  background: linear-gradient(135deg, rgba(255,107,53,.15), rgba(0,212,170,.15));
}
.pypy7cm h4 { margin-bottom: 10px; font-size: 1.1rem; }
.pypy7cm p { color: #B8B8D0; font-size: .88rem; line-height: 1.6; }

/* ========== Expert Section ========== */
.sv7p0m7 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.uly6srp6 {
  background: #1E1E3A;
  border-radius: 16px;
  padding: 24px;
  text-align: center;
  transition: all .35s;
  border: 1px solid rgba(255,255,255,.04);
}
.uly6srp6:hover {
  transform: translateY(-4px);
  border-color: rgba(0,212,170,.2);
}
.jmrdyi {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  margin: 0 auto 16px;
  overflow: hidden;
  border: 3px solid rgba(255,107,53,.3);
}
.jmrdyi img { width: 100%; height: 100%; object-fit: cover; }
.uly6srp6 h4 { font-size: 1rem; margin-bottom: 4px; }
.uly6srp6 .izj33r { color: #FF6B35; font-size: .82rem; margin-bottom: 10px; }
.uly6srp6 p { color: #B8B8D0; font-size: .82rem; line-height: 1.5; }
.so5qm { display: flex; justify-content: center; gap: 10px; margin-top: 14px; }
.so5qm a {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: .78rem;
  border: 1px solid rgba(255,107,53,.3);
  color: #FF6B35;
  transition: all .3s;
}
.so5qm a:hover { background: rgba(255,107,53,.1); }

/* ========== Brand Wall ========== */
.z0ugsl {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px;
  align-items: center;
}
.ky5vqwg2 {
  width: 140px;
  height: 60px;
  background: rgba(30,30,58,.6);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,.06);
  color: #888;
  font-size: .85rem;
  font-weight: 600;
  transition: all .3s;
}
.ky5vqwg2:hover {
  border-color: rgba(255,107,53,.3);
  color: #FF6B35;
}

/* ========== Reviews ========== */
.mo9h2rt2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.roi66y {
  background: #1E1E3A;
  border-radius: 14px;
  padding: 24px;
  border: 1px solid rgba(255,255,255,.04);
  transition: all .3s;
}
.roi66y:hover { border-color: rgba(0,212,170,.15); }
.w7rdkj { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.dezyo {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #FF6B35, #00D4AA);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
}
.k3jl5 { font-weight: 600; font-size: .9rem; }
.r9xqftn6 { color: #FFB800; font-size: .85rem; letter-spacing: 2px; }
.xy0wnp { color: #B8B8D0; font-size: .88rem; line-height: 1.7; }
.a8sps { color: #666; font-size: .78rem; margin-top: 10px; }

/* ========== FAQ ========== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: #1E1E3A;
  border-radius: 12px;
  margin-bottom: 12px;
  border: 1px solid rgba(255,255,255,.04);
  overflow: hidden;
}
.faq-question {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: .95rem;
  transition: color .3s;
}
.faq-question:hover { color: #FF6B35; }
.faq-question .swx3df9 {
  transition: transform .3s;
  font-size: .8rem;
  color: #FF6B35;
}
.faq-item.active .faq-question .swx3df9 { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .4s ease;
  padding: 0 24px;
}
.faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 18px; }
.faq-answer p { color: #B8B8D0; font-size: .88rem; line-height: 1.7; }

/* ========== Contact Section ========== */
.j3hsgs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.drwc4w {
  background: #1E1E3A;
  border-radius: 14px;
  padding: 28px;
  text-align: center;
  border: 1px solid rgba(255,255,255,.04);
}
.drwc4w h4 { margin-bottom: 12px; font-size: 1rem; }
.drwc4w p { color: #B8B8D0; font-size: .85rem; line-height: 1.8; }
.drwc4w img { max-width: 150px; margin: 12px auto; border-radius: 8px; }

/* ========== How-To Guide ========== */
.fndxt3q8 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}
.ste9z4 {
  background: #1E1E3A;
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  position: relative;
  border: 1px solid rgba(255,255,255,.04);
}
.ste9z4::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #FF6B35, #00D4AA);
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 auto 14px;
}
.ste9z4 h4 { font-size: .95rem; margin-bottom: 8px; }
.ste9z4 p { color: #B8B8D0; font-size: .82rem; }

/* ========== Social Share ========== */
.gq6k8 {
  display: flex;
  justify-content: center;
  gap: 16px;
  padding: 20px 0;
}
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  border-radius: 25px;
  font-size: .85rem;
  color: #fff;
  transition: all .3s;
  border: none;
  cursor: pointer;
}
.share-btn:hover { transform: translateY(-2px); color: #fff; }
.share-btn.wechat { background: #07C160; }
.share-btn.weibo { background: #E6162D; }
.share-btn.douyin { background: #161823; border: 1px solid #333; }
.share-btn.bilibili { background: #00A1D6; }

/* ========== Footer ========== */
.site-footer {
  background: #0A0A18;
  border-top: 1px solid rgba(255,255,255,.04);
  padding: 50px 0 20px;
}
.tbe5if5 {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.hsgg5 .r6bnov { margin-bottom: 14px; }
.hsgg5 p { color: #888; font-size: .85rem; line-height: 1.7; }
.icl1qn h5 {
  color: #fff;
  font-size: .95rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(255,107,53,.3);
  display: inline-block;
}
.icl1qn a {
  display: block;
  color: #888;
  font-size: .85rem;
  padding: 4px 0;
  transition: color .3s;
}
.icl1qn a:hover { color: #FF6B35; }
.agv8uk9f { display: flex; gap: 20px; margin-top: 16px; }
.q210znn7 { text-align: center; }
.q210znn7 img { width: 100px; border-radius: 6px; margin-bottom: 6px; }
.q210znn7 span { font-size: .75rem; color: #888; }
.p6nwyh9n {
  border-top: 1px solid rgba(255,255,255,.04);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.p6nwyh9n p { color: #666; font-size: .8rem; }

/* ========== Breadcrumb ========== */
.aasdni0 {
  padding: 14px 0;
  margin-top: 68px;
  background: rgba(30,30,58,.5);
  border-bottom: 1px solid rgba(255,255,255,.04);
}
.bobzsa {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  font-size: .85rem;
  color: #888;
}
.bobzsa a { color: #B8B8D0; }
.bobzsa a:hover { color: #FF6B35; }
.bobzsa span { margin: 0 8px; color: #555; }

/* ========== Inner Page Hero ========== */
.h71unqt {
  position: relative;
  min-height: 280px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: linear-gradient(135deg, #1A0A2E, #0D0D1A);
}
.h71unqt .wmc164x { opacity: .25; }
.ootma {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
  width: 100%;
}
.h71unqt h1 { font-size: 2.2rem; margin-bottom: 10px; }
.h71unqt p { color: #B8B8D0; font-size: 1rem; }

/* ========== AI Section ========== */
.k1ehbz {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: center;
}
.k1ehbz img { border-radius: 16px; }
.osb5ex { display: flex; flex-direction: column; gap: 16px; }
.yyzutq9 {
  display: flex;
  gap: 14px;
  padding: 16px;
  background: rgba(30,30,58,.6);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.04);
}
.yyzutq9 .e8teh {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(255,107,53,.15), rgba(0,212,170,.15));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.yyzutq9 h5 { font-size: .92rem; margin-bottom: 4px; }
.yyzutq9 p { color: #B8B8D0; font-size: .82rem; }

/* ========== Community Features ========== */
.xaccmx {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.p6gyu {
  background: linear-gradient(145deg, #1E1E3A, #161630);
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  border: 1px solid rgba(255,255,255,.04);
  transition: all .35s;
}
.p6gyu:hover {
  transform: translateY(-4px);
  border-color: rgba(0,212,170,.2);
}
.p6gyu .e8teh {
  font-size: 2rem;
  margin-bottom: 14px;
}
.p6gyu h4 { font-size: 1rem; margin-bottom: 8px; }
.p6gyu p { color: #B8B8D0; font-size: .85rem; }

/* ========== Stats Bar ========== */
.wrob2e {
  background: linear-gradient(135deg, rgba(255,107,53,.08), rgba(0,212,170,.08));
  border-radius: 16px;
  padding: 30px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
  margin: 30px 0;
}
.rmkwp .hx2yd {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, #FF6B35, #00D4AA);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.rmkwp .dbllqoa { color: #B8B8D0; font-size: .85rem; margin-top: 4px; }

/* ========== Lazy Load ========== */
img[data-src] { opacity: 0; transition: opacity .5s; }
img[data-src].loaded { opacity: 1; }

/* ========== MCP Placeholder ========== */
.h2xy7 {
  background: rgba(30,30,58,.4);
  border: 1px dashed rgba(255,107,53,.2);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  color: #666;
  font-size: .85rem;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .y5kgh { grid-template-columns: repeat(3, 1fr); }
  .tbe5if5 { grid-template-columns: 1fr 1fr; gap: 30px; }
}
@media (max-width: 768px) {
  .section { padding: 40px 0; }
  .i4kj5im9 { font-size: 1.6rem; }
  .hero h1 { font-size: 2rem; }
  .hero h2 { font-size: 1.1rem; }
  .y5kgh { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .i03no6 { grid-template-columns: 1fr; }
  .sv7p0m7 { grid-template-columns: repeat(2, 1fr); }
  .mo9h2rt2 { grid-template-columns: 1fr; }
  .j3hsgs { grid-template-columns: 1fr; }
  .fndxt3q8 { grid-template-columns: repeat(2, 1fr); }
  .k1ehbz { grid-template-columns: 1fr; }
  .xaccmx { grid-template-columns: 1fr; }
  .wrob2e { grid-template-columns: repeat(2, 1fr); }
  .tbe5if5 { grid-template-columns: 1fr; }
  .main-nav { 
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(13,13,26,.98);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid rgba(255,255,255,.06);
  }
  .main-nav.show { display: flex; }
  .mobile-toggle { display: flex; }
  .gq6k8 { flex-wrap: wrap; }
  .ky5vqwg2 { width: 110px; height: 50px; font-size: .75rem; }
}
@media (max-width: 480px) {
  .y5kgh { grid-template-columns: 1fr; }
  .sv7p0m7 { grid-template-columns: 1fr; }
  .fndxt3q8 { grid-template-columns: 1fr; }
  .wrob2e { grid-template-columns: 1fr; }
  .eomk32aj { padding: 80px 16px 40px; }
  .hero h1 { font-size: 1.6rem; }
}