@charset "UTF-8";

:root {
  --p: #5FAFAF;
  --p-d: #478E8E;
  --p-dd: #336E6E;
  --p-l: #85C6C6;
  --p-ll: #ACD7D7;
  --a-ll: #B3DDDD;
  --a-lll: #CFE9E9;
  --bg-1: #E8F1F1;
  --bg-2: #F4F8F8;
  --bg-3: #E5EFEF;
  --t-1: #2C5555;
  --t-2: #406060;
  --t-3: #5A7A7A;
  --t-4: #6B8989;
  --t-5: #91A9A9;
  --t-6: #B4C4C4;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(135deg, var(--bg-1) 0%, var(--bg-2) 50%, var(--bg-3) 100%);
  color: var(--t-2);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  -webkit-tap-highlight-color: transparent;
  tap-highlight-color: transparent;
}

ul {
  list-style: none;
}

i {
  font-style: normal;
  display: inline-block;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.bg-decor {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  z-index: 0;
  pointer-events: none;
}

.bg-decor-1 {
  width: 400px;
  height: 400px;
  background: var(--a-ll);
  top: -100px;
  right: -100px;
}

.bg-decor-2 {
  width: 300px;
  height: 300px;
  background: var(--a-lll);
  bottom: 10%;
  left: -80px;
}

.bg-decor-3 {
  width: 350px;
  height: 350px;
  background: #DDECEB;
  top: 40%;
  right: -100px;
}

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(244, 248, 248, 0.86);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(179, 221, 221, 0.5);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(95, 175, 175, 0.25);
}

.brand-name {
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--p-d), var(--p));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

.nav-menu ul {
  display: flex;
  gap: 34px;
}

.nav-menu a {
  font-size: 15px;
  font-weight: 500;
  color: var(--t-3);
  position: relative;
  padding: 6px 0;
  transition: color 0.3s;
}

.nav-menu a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--p-d);
  border-radius: 2px;
  transition: width 0.3s;
}

.nav-menu a:hover {
  color: var(--p-d);
}

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

.btn-nav {
  padding: 10px 26px;
  background: linear-gradient(135deg, var(--p), var(--p-d));
  color: #fff;
  border-radius: 24px;
  font-weight: 600;
  font-size: 14px;
  box-shadow: 0 6px 18px rgba(71, 142, 142, 0.32);
  transition: transform 0.3s, box-shadow 0.3s;
  flex-shrink: 0;
}

.btn-nav:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(71, 142, 142, 0.42);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--p-d);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  z-index: 1;
  padding: 60px 0 80px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(179, 221, 221, 0.55);
  border-radius: 20px;
  font-size: 13px;
  color: var(--p-d);
  font-weight: 600;
  margin-bottom: 24px;
  backdrop-filter: blur(10px);
}

.tag .dot {
  width: 8px;
  height: 8px;
  background: var(--p-d);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
  font-size: 52px;
  font-weight: 900;
  line-height: 1.15;
  color: var(--t-1);
  margin-bottom: 20px;
}

.hero h1 span {
  background: linear-gradient(135deg, var(--p-d), var(--p-l));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 17px;
  color: var(--t-4);
  margin-bottom: 36px;
  max-width: 480px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 28px;
  border-radius: 16px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.3s, box-shadow 0.3s, background 0.3s, border-color 0.3s;
}

.btn i {
  width: 22px;
  height: 22px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--p), var(--p-d));
  color: #fff;
  box-shadow: 0 10px 28px rgba(71, 142, 142, 0.36);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(71, 142, 142, 0.46);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.85);
  color: var(--p-d);
  border: 2px solid rgba(179, 221, 221, 0.65);
}

.btn-secondary:hover {
  transform: translateY(-3px);
  border-color: var(--p);
  background: #fff;
}

.stats {
  display: flex;
  gap: 40px;
}

.stats h3 {
  font-size: 28px;
  font-weight: 800;
  color: var(--p-d);
}

.stats p {
  font-size: 13px;
  color: var(--t-5);
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 520px;
}

.phone-frame {
  position: relative;
  width: 280px;
  height: 560px;
  background: #fff;
  border-radius: 40px;
  padding: 12px;
  box-shadow: 0 30px 60px rgba(71, 142, 142, 0.23), 0 0 0 2px rgba(179, 221, 221, 0.32);
}

.phone-screen {
  width: 100%;
  height: 100%;
  border-radius: 30px;
  overflow: hidden;
  background: var(--bg-3);
}

.phone-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.phone-float-1,
.phone-float-2 {
  position: absolute;
  width: 150px;
  height: 300px;
  background: #fff;
  border-radius: 24px;
  padding: 8px;
  box-shadow: 0 20px 50px rgba(71, 142, 142, 0.18);
  overflow: hidden;
}

.phone-float-1 {
  top: 40px;
  left: 20px;
  transform: rotate(-8deg);
}

.phone-float-2 {
  bottom: 40px;
  right: 20px;
  transform: rotate(8deg);
}

.phone-float-1 img,
.phone-float-2 img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 18px;
}

.section {
  position: relative;
  z-index: 1;
  padding: 60px 0 80px;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-label {
  display: inline-block;
  padding: 6px 18px;
  background: rgba(179, 221, 221, 0.35);
  color: var(--p-d);
  border-radius: 16px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-title {
  font-size: 38px;
  font-weight: 800;
  color: var(--t-1);
  margin-bottom: 12px;
}

.section-desc {
  font-size: 16px;
  color: var(--t-4);
  max-width: 600px;
  margin: 0 auto;
}

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

.feature-card {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 32px 24px;
  text-align: center;
  border: 1px solid rgba(179, 221, 221, 0.45);
  transition: transform 0.4s, box-shadow 0.4s, border-color 0.4s;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 50px rgba(71, 142, 142, 0.18);
  border-color: rgba(95, 175, 175, 0.62);
}

.feature-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.feature-icon i {
  width: 32px;
  height: 32px;
}

.feature-icon-1 { background: linear-gradient(135deg, #6FB1B1, #478E8E); }
.feature-icon-2 { background: linear-gradient(135deg, #559E9A, #45887F); }
.feature-icon-3 { background: linear-gradient(135deg, #67AAA3, #4F9490); }
.feature-icon-4 { background: linear-gradient(135deg, #45887F, #336E6E); }

.feature-card h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--t-1);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--t-4);
}

.screenshots-scroll {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding: 20px 10px 30px;
  scroll-snap-type: x mandatory;
}

.screenshots-scroll::-webkit-scrollbar {
  height: 8px;
}

.screenshots-scroll::-webkit-scrollbar-track {
  background: rgba(179, 221, 221, 0.22);
  border-radius: 10px;
}

.screenshots-scroll::-webkit-scrollbar-thumb {
  background: linear-gradient(90deg, #CFE9E9, var(--p));
  border-radius: 10px;
}

.screenshot-card {
  flex-shrink: 0;
  width: 240px;
  height: 480px;
  background: #fff;
  border-radius: 28px;
  padding: 10px;
  box-shadow: 0 16px 40px rgba(71, 142, 142, 0.14);
  transition: transform 0.4s, box-shadow 0.4s;
  scroll-snap-align: start;
  overflow: hidden;
}

.screenshot-card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 26px 60px rgba(71, 142, 142, 0.26);
}

.screenshot-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 20px;
}

.cta-card {
  position: relative;
  background: linear-gradient(135deg, var(--p) 0%, var(--p-d) 50%, var(--p-dd) 100%);
  border-radius: 40px;
  padding: 60px 50px;
  overflow: hidden;
  color: #fff;
  text-align: center;
}

.cta-card::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  top: -100px;
  right: -50px;
}

.cta-card::after {
  content: "";
  position: absolute;
  width: 250px;
  height: 250px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  bottom: -80px;
  left: -40px;
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta-title {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 14px;
}

.cta-desc {
  font-size: 16px;
  opacity: 0.92;
  margin-bottom: 36px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.cta-btns {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 30px;
  border-radius: 16px;
  font-weight: 600;
  font-size: 15px;
  transition: transform 0.3s, box-shadow 0.3s, background 0.3s, border-color 0.3s;
}

.cta-btn i {
  width: 22px;
  height: 22px;
}

.cta-btn-white {
  background: #fff;
  color: var(--p-d);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.13);
}

.cta-btn-white:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
}

.cta-btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.cta-btn-outline:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  transform: translateY(-3px);
}

.about-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-text h3 {
  font-size: 26px;
  font-weight: 800;
  color: var(--t-1);
  margin-bottom: 16px;
}

.about-text p {
  font-size: 15px;
  color: var(--t-4);
  margin-bottom: 14px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid rgba(179, 221, 221, 0.45);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.faq-item.open {
  border-color: rgba(95, 175, 175, 0.62);
  box-shadow: 0 12px 30px rgba(71, 142, 142, 0.12);
}

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--t-1);
  text-align: left;
}

.faq-arrow {
  position: relative;
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.faq-arrow::before,
.faq-arrow::after {
  content: "";
  position: absolute;
  background: var(--p-d);
  border-radius: 2px;
  transition: transform 0.3s;
}

.faq-arrow::before {
  width: 14px;
  height: 2px;
  top: 6px;
  left: 0;
}

.faq-arrow::after {
  width: 2px;
  height: 14px;
  left: 6px;
  top: 0;
}

.faq-item.open .faq-arrow::after {
  transform: rotate(90deg);
  opacity: 0;
}

.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-a p {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--t-4);
}

.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(179, 221, 221, 0.45);
  padding: 40px 0 30px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

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

.footer-brand img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
}

.footer-brand span {
  font-weight: 700;
  color: var(--p-d);
}

.footer-links {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 14px;
  color: var(--t-5);
  transition: color 0.3s;
}

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

.footer-copy {
  width: 100%;
  text-align: center;
  padding-top: 24px;
  margin-top: 24px;
  border-top: 1px solid rgba(179, 221, 221, 0.32);
  font-size: 13px;
  color: var(--t-6);
}

.back-top {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 60;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--p), var(--p-d));
  box-shadow: 0 10px 26px rgba(71, 142, 142, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
}

.back-top::before {
  content: "";
  position: absolute;
  top: 19px;
  left: 18px;
  width: 12px;
  height: 12px;
  border-left: 2px solid #fff;
  border-top: 2px solid #fff;
  transform: rotate(45deg);
}

.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.icon-book::before,
.icon-hd::before,
.icon-offline::before,
.icon-recommend::before,
.icon-android::before,
.icon-apple::before {
  content: "";
  display: block;
  width: 100%;
  height: 100%;
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
}

.icon-book::before { background-image: url("../icons/book.svg"); }
.icon-hd::before { background-image: url("../icons/hd.svg"); }
.icon-offline::before { background-image: url("../icons/offline.svg"); }
.icon-recommend::before { background-image: url("../icons/recommend.svg"); }
.icon-android::before { background-image: url("../images/安卓.svg"); }
.icon-apple::before { background-image: url("../images/苹果.svg"); }

@media (max-width: 968px) {
  .nav-menu {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(244, 248, 248, 0.98);
    border-bottom: 1px solid rgba(179, 221, 221, 0.5);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .nav-menu.open {
    max-height: 320px;
  }

  .nav-menu ul {
    flex-direction: column;
    gap: 0;
    padding: 10px 24px 20px;
  }

  .nav-menu li {
    border-bottom: 1px solid rgba(179, 221, 221, 0.3);
  }

  .nav-menu a {
    display: block;
    padding: 14px 0;
  }

  .nav-menu a::after {
    display: none;
  }

  .btn-nav {
    margin-left: auto;
  }

  .nav-toggle {
    display: flex;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .phone-float-1,
  .phone-float-2 {
    display: none;
  }

  .about-wrap {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 568px) {
  .hero {
    padding: 40px 0 60px;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero-btns {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .stats {
    gap: 24px;
    flex-wrap: wrap;
  }

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

  .section-title {
    font-size: 28px;
  }

  .cta-card {
    padding: 40px 24px;
  }

  .cta-title {
    font-size: 28px;
  }

  .cta-btns {
    flex-direction: column;
  }

  .cta-btn {
    width: 100%;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}