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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Microsoft YaHei", Arial, sans-serif;
  background:
    radial-gradient(circle at top, rgba(120, 20, 20, 0.35), transparent 35%),
    #090909;
  color: #ddd;
}

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

ul {
  list-style: none;
}

/* 顶部导航 */
.header {
  width: 100%;
  height: 76px;
  background: rgba(5, 5, 5, 0.96);
  border-bottom: 1px solid rgba(220, 170, 80, 0.35);
  position: fixed;
  left: 0;
  top: 0;
  z-index: 999;
  backdrop-filter: blur(8px);
}

.nav {
  max-width: 1300px;
  height: 76px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-icon {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: radial-gradient(circle, #ffdc8a, #b82820 60%, #200606);
  box-shadow: 0 0 22px rgba(255, 130, 40, 0.6);
}

.logo-text h1 {
  color: #f2c56b;
  font-size: 22px;
  letter-spacing: 2px;
}

.logo-text p {
  margin-top: 3px;
  font-size: 12px;
  color: #888;
}

.menu {
  display: flex;
  height: 76px;
  align-items: center;
}

.menu > li {
  position: relative;
  height: 76px;
  display: flex;
  align-items: center;
}

.menu > li > a {
  height: 76px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  color: #ddd;
  font-size: 16px;
  transition: 0.25s;
  position: relative;
}

.menu > li > a:hover,
.menu > li.active > a {
  color: #f2c56b;
  background: linear-gradient(180deg, rgba(242,197,107,0.08), transparent);
}

.menu > li > a::after {
  content: "";
  width: 0;
  height: 2px;
  background: #f2c56b;
  position: absolute;
  left: 20px;
  bottom: 0;
  transition: 0.25s;
}

.menu > li > a:hover::after,
.menu > li.active > a::after {
  width: calc(100% - 40px);
}

.arrow {
  margin-left: 7px;
  color: #9c7b42;
  font-size: 12px;
  transition: 0.25s;
}

.has-dropdown:hover .arrow {
  transform: rotate(180deg);
  color: #f2c56b;
}

.dropdown {
  position: absolute;
  top: 76px;
  left: 50%;
  transform: translateX(-50%) translateY(12px);
  width: 240px;
  background: linear-gradient(180deg, rgba(24, 16, 10, 0.98), rgba(8, 8, 8, 0.98));
  border: 1px solid rgba(220, 170, 80, 0.38);
  box-shadow: 0 18px 40px rgba(0,0,0,0.65);
  opacity: 0;
  visibility: hidden;
  transition: 0.25s;
  padding: 10px 0;
}

.has-dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown a {
  display: block;
  padding: 14px 22px;
  color: #bbb;
  font-size: 15px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: 0.25s;
}

.dropdown a:hover {
  color: #f2c56b;
  background: linear-gradient(90deg, rgba(242,197,107,0.14), transparent);
  padding-left: 30px;
}

.dropdown a strong {
  color: #f2c56b;
  margin-right: 8px;
  font-size: 17px;
}

.nav-download {
  padding: 10px 22px;
  background: linear-gradient(180deg, #f8d98a, #a96a1d);
  color: #1b0e04;
  font-weight: bold;
  border-radius: 3px;
  box-shadow: 0 0 18px rgba(245, 178, 65, 0.35);
  transition: 0.25s;
}

.nav-download:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
}

/* 英雄区 */
.hero {
  min-height: 720px;
  padding-top: 76px;
  position: relative;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(0,0,0,0.88), rgba(0,0,0,0.48), rgba(0,0,0,0.18)),
    repeating-linear-gradient(
      0deg,
      rgba(255,255,255,0.025) 0,
      rgba(255,255,255,0.025) 1px,
      transparent 1px,
      transparent 4px
    );
}

.hero::after {
  content: attr(data-version);
  position: absolute;
  right: 7%;
  bottom: 4%;
  color: rgba(255,255,255,0.045);
  font-size: 250px;
  font-weight: bold;
  line-height: 1;
}

.hero-inner {
  max-width: 1300px;
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 2;
}

.hero-tag {
  color: #f2c56b;
  font-size: 22px;
  letter-spacing: 5px;
  margin-bottom: 16px;
  text-shadow: 0 0 18px rgba(242,197,107,0.5);
}

.hero-title {
  color: #fff;
  font-size: 70px;
  line-height: 1.08;
  margin-bottom: 24px;
  text-shadow: 0 0 28px rgba(0,0,0,0.9);
}

.hero-title span {
  color: #e33a30;
  text-shadow: 0 0 26px rgba(227,58,48,0.55);
}

.hero-desc {
  max-width: 620px;
  color: #cfcfcf;
  font-size: 17px;
  line-height: 1.9;
  margin-bottom: 36px;
}

.hero-buttons {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.btn-main,
.btn-line {
  width: 186px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: bold;
  transition: 0.25s;
}

.btn-main {
  background: linear-gradient(180deg, #f8d98a, #a96a1d);
  color: #1b0e04;
}

.btn-line {
  border: 1px solid #a97937;
  color: #f2c56b;
  background: rgba(0, 0, 0, 0.48);
}

.btn-main:hover,
.btn-line:hover {
  transform: translateY(-3px);
  filter: brightness(1.12);
}

/* 通用区块 */
.section {
  max-width: 1300px;
  margin: 0 auto;
  padding: 78px 24px 0;
}

.section-title {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding-bottom: 16px;
  margin-bottom: 30px;
  border-bottom: 1px solid rgba(220, 170, 80, 0.32);
}

.section-title h2 {
  color: #f2c56b;
  font-size: 34px;
  letter-spacing: 3px;
}

.section-title p {
  color: #777;
  font-size: 14px;
  letter-spacing: 2px;
}

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

.card {
  background: linear-gradient(180deg, rgba(28,28,32,0.98), rgba(12,12,13,0.98));
  border: 1px solid rgba(220,170,80,0.28);
  min-height: 250px;
  padding: 30px;
  position: relative;
  overflow: hidden;
  transition: 0.25s;
}

.card:hover {
  transform: translateY(-6px);
  border-color: #f2c56b;
  box-shadow: 0 18px 42px rgba(0,0,0,0.55);
}

.card h3 {
  color: #fff;
  font-size: 24px;
  margin-bottom: 14px;
}

.card p {
  color: #aaa;
  line-height: 1.8;
  font-size: 15px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.tag-list span {
  padding: 9px 16px;
  border: 1px solid rgba(242,197,107,0.42);
  color: #f2c56b;
  background: rgba(0,0,0,0.34);
  font-size: 14px;
}

.feature-panel {
  background:
    radial-gradient(circle at 70% 45%, rgba(180, 40, 40, 0.24), transparent 35%),
    linear-gradient(135deg, rgba(72,20,20,0.48), rgba(13,13,14,0.98));
  border: 1px solid rgba(220,170,80,0.28);
  padding: 42px;
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 30px;
}

.feature-panel h3 {
  color: #fff;
  font-size: 36px;
  margin-bottom: 18px;
}

.feature-panel p {
  color: #bbb;
  line-height: 1.9;
  font-size: 16px;
  margin-bottom: 18px;
}

.side-box {
  background: rgba(0,0,0,0.5);
  border: 1px solid rgba(242,197,107,0.35);
  padding: 24px;
}

.side-box h4 {
  color: #f2c56b;
  font-size: 22px;
  margin-bottom: 14px;
}

.footer {
  margin-top: 80px;
  padding: 36px 20px;
  text-align: center;
  background: #050505;
  border-top: 1px solid rgba(220,170,80,0.25);
  color: #777;
  line-height: 2;
  font-size: 14px;
}

/* 下载页 */
.download-hero {
  min-height: 520px;
}

.download-wrap {
  max-width: 1300px;
  margin: -80px auto 0;
  padding: 0 24px;
  position: relative;
  z-index: 5;
}

.download-box {
  background: linear-gradient(135deg, rgba(70,20,15,0.92), rgba(12,12,12,0.98));
  border: 1px solid rgba(220,170,80,0.38);
  box-shadow: 0 18px 45px rgba(0,0,0,0.55);
  padding: 36px;
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 30px;
}

.download-main h2 {
  color: #f2c56b;
  font-size: 34px;
  margin-bottom: 14px;
}

.download-main p {
  color: #bbb;
  line-height: 1.9;
  margin-bottom: 24px;
}

.download-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.big-download {
  min-width: 210px;
  height: 58px;
  background: linear-gradient(180deg, #f8d98a, #a96a1d);
  color: #1b0e04;
  font-weight: bold;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.outline-download {
  min-width: 180px;
  height: 58px;
  border: 1px solid #a97937;
  color: #f2c56b;
  display: flex;
  align-items: center;
  justify-content: center;
}

.download-info {
  background: rgba(0,0,0,0.38);
  border: 1px solid rgba(220,170,80,0.24);
  padding: 22px;
}

.download-info h3 {
  color: #f2c56b;
  margin-bottom: 14px;
}

.download-info p {
  color: #aaa;
  font-size: 14px;
  line-height: 1.9;
}

.table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

.table th,
.table td {
  border: 1px solid rgba(220,170,80,0.22);
  padding: 14px 16px;
  color: #bbb;
  text-align: left;
}

.table th {
  color: #f2c56b;
  background: rgba(0,0,0,0.36);
}

@media (max-width: 1000px) {
  .menu,
  .nav-download {
    display: none;
  }

  .hero-title {
    font-size: 44px;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .feature-panel {
    grid-template-columns: 1fr;
    padding: 28px;
  }

  .download-box {
    grid-template-columns: 1fr;
  }
}
/* =========================
   70版本专属风格
========================= */

body.version-70 {
  background:
    radial-gradient(circle at top, rgba(92, 38, 145, 0.42), transparent 36%),
    radial-gradient(circle at 80% 15%, rgba(180, 40, 60, 0.22), transparent 30%),
    #08080b;
}

.version-70 .logo-icon {
  background: radial-gradient(circle, #ffe6a6, #7b39ff 52%, #17001f 78%);
  box-shadow: 0 0 24px rgba(123, 57, 255, 0.65);
}

.version-70 .hero-title span {
  color: #b784ff;
  text-shadow: 0 0 26px rgba(183, 132, 255, 0.65);
}

.version-70 .hero-tag {
  color: #d7b4ff;
  text-shadow: 0 0 18px rgba(183, 132, 255, 0.65);
}

.version-70 .section-title h2 {
  color: #d7b4ff;
}

.version-70 .tag-list span {
  border-color: rgba(183, 132, 255, 0.45);
  color: #d7b4ff;
}

.version-70 .card:hover {
  border-color: #b784ff;
}

.version-70 .btn-main,
.version-70 .nav-download {
  background: linear-gradient(180deg, #f8d98a, #8a55d6);
  color: #16071e;
}

.version-70 .btn-line {
  border-color: #8d65c8;
  color: #d7b4ff;
}

/* =========================
   60 vs 70 对比模块
========================= */

.compare-panel {
  background:
    linear-gradient(135deg, rgba(46, 20, 70, 0.92), rgba(12, 12, 15, 0.98)),
    radial-gradient(circle at right, rgba(183, 132, 255, 0.16), transparent 35%);
  border: 1px solid rgba(183, 132, 255, 0.35);
  box-shadow: 0 18px 45px rgba(0,0,0,0.55);
  overflow: hidden;
}

.compare-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: rgba(0,0,0,0.42);
  border-bottom: 1px solid rgba(183, 132, 255, 0.25);
}

.compare-title {
  min-height: 120px;
  padding: 28px 34px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.compare-title:first-child {
  border-right: 1px solid rgba(255,255,255,0.08);
}

.compare-title strong {
  font-size: 42px;
  line-height: 1;
  margin-bottom: 10px;
}

.compare-title span {
  color: #aaa;
  font-size: 15px;
}

.compare-title.old strong {
  color: #f2c56b;
  text-shadow: 0 0 16px rgba(242,197,107,0.45);
}

.compare-title.new strong {
  color: #d7b4ff;
  text-shadow: 0 0 16px rgba(183,132,255,0.55);
}

.compare-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.compare-col {
  padding: 30px 34px;
}

.compare-col:first-child {
  border-right: 1px solid rgba(255,255,255,0.08);
}

.compare-item {
  padding: 18px 0;
  border-bottom: 1px dashed rgba(255,255,255,0.12);
}

.compare-item:last-child {
  border-bottom: none;
}

.compare-item h3 {
  color: #fff;
  font-size: 19px;
  margin-bottom: 8px;
}

.compare-item p {
  color: #aaa;
  font-size: 15px;
  line-height: 1.75;
}

.compare-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 5px 11px;
  font-size: 12px;
  border: 1px solid rgba(242,197,107,0.4);
  color: #f2c56b;
  background: rgba(0,0,0,0.3);
}

.compare-col.new .compare-tag {
  border-color: rgba(183,132,255,0.45);
  color: #d7b4ff;
}

.compare-bottom {
  padding: 26px 34px;
  background: rgba(0,0,0,0.32);
  border-top: 1px solid rgba(183,132,255,0.25);
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 24px;
  align-items: center;
}

.compare-bottom h3 {
  color: #d7b4ff;
  font-size: 24px;
  margin-bottom: 8px;
}

.compare-bottom p {
  color: #aaa;
  line-height: 1.8;
  font-size: 15px;
}

.compare-bottom a {
  height: 48px;
  background: linear-gradient(180deg, #f8d98a, #8a55d6);
  color: #16071e;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.25s;
}

.compare-bottom a:hover {
  transform: translateY(-3px);
  filter: brightness(1.1);
}

/* 70版本特色提示 */
.version70-notice {
  max-width: 1300px;
  margin: -86px auto 0;
  padding: 0 24px;
  position: relative;
  z-index: 6;
}

.version70-notice-box {
  min-height: 150px;
  background:
    linear-gradient(90deg, rgba(58, 22, 88, 0.96), rgba(15, 15, 18, 0.98)),
    radial-gradient(circle at right, rgba(183,132,255,0.18), transparent 35%);
  border: 1px solid rgba(183,132,255,0.4);
  box-shadow: 0 18px 45px rgba(0,0,0,0.6);
  display: grid;
  grid-template-columns: 240px 1fr 220px;
  align-items: center;
  overflow: hidden;
}

.version70-notice-left {
  height: 100%;
  background: linear-gradient(180deg, #e8c7ff, #7b39ff);
  color: #17001f;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.version70-notice-left strong {
  font-size: 32px;
  margin-bottom: 8px;
}

.version70-notice-left span {
  font-size: 14px;
  opacity: 0.86;
}

.version70-notice-content {
  padding: 24px 30px;
}

.version70-notice-content h3 {
  color: #d7b4ff;
  font-size: 24px;
  margin-bottom: 12px;
}

.version70-notice-content p {
  color: #bbb;
  line-height: 1.8;
  font-size: 15px;
}

.version70-notice-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.version70-notice-tags span {
  padding: 7px 13px;
  border: 1px solid rgba(183,132,255,0.42);
  color: #d7b4ff;
  background: rgba(0,0,0,0.28);
  font-size: 13px;
}

.version70-notice-action {
  padding-right: 28px;
}

.version70-notice-action a {
  width: 170px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.45);
  border: 1px solid #8d65c8;
  color: #d7b4ff;
  font-weight: bold;
  transition: 0.25s;
}

.version70-notice-action a:hover {
  background: linear-gradient(180deg, #e8c7ff, #7b39ff);
  color: #17001f;
  transform: translateY(-3px);
}

@media (max-width: 1000px) {
  .compare-head,
  .compare-body,
  .compare-bottom,
  .version70-notice-box {
    grid-template-columns: 1fr;
  }

  .compare-title:first-child,
  .compare-col:first-child {
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }

  .version70-notice-left {
    padding: 24px 0;
  }

  .version70-notice-action {
    padding: 0 30px 26px;
  }

  .version70-notice-action a {
    width: 100%;
  }
}