:root {
  --green: #07C160;
  --green-dark: #06A050;
  --green-light: #E8F8F0;
  --navy: #0B1F3A;
  --navy-2: #122947;
  --ink: #1A2233;
  --muted: #5B6678;
  --line: #E6EBF2;
  --bg-soft: #F6F9FC;
  --white: #FFFFFF;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(11, 31, 58, .08);
  --shadow-lg: 0 20px 50px rgba(7, 193, 96, .14);
  --maxw: 1180px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
h1, h2, h3, h4, h5 { line-height: 1.25; color: var(--navy); font-weight: 700; }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 24px; border-radius: 999px; font-weight: 600; font-size: 15px;
  cursor: pointer; border: 1px solid transparent; transition: .25s ease; white-space: nowrap;
}
.btn--primary { background: var(--green); color: #fff; box-shadow: var(--shadow-lg); }
.btn--primary:hover { background: var(--green-dark); transform: translateY(-2px); }
.btn--ghost { background: rgba(255,255,255,.12); color: #fff; border-color: rgba(255,255,255,.35); }
.btn--ghost:hover { background: rgba(255,255,255,.2); }
.btn--lg { padding: 15px 32px; font-size: 16px; }
.btn--block { width: 100%; padding: 15px; }

/* 导航 */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 100; transition: .3s; }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav.scrolled { background: rgba(255,255,255,.96); backdrop-filter: blur(10px); box-shadow: 0 4px 20px rgba(11,31,58,.08); }
.nav.scrolled .nav__link, .nav.scrolled .brand__name { color: var(--navy); }
.nav.scrolled .brand__name small { color: var(--muted); }

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand__logo {
  width: 38px; height: 38px; border-radius: 10px; background: var(--green); color: #fff;
  display: grid; place-items: center; font-size: 20px; box-shadow: var(--shadow-lg);
}
.brand__img {
  width: 42px; height: 42px; border-radius: 10px; object-fit: cover; display: block;
  box-shadow: 0 4px 12px rgba(0,0,0,.25);
}
.brand__name { font-size: 19px; color: #fff; display: flex; flex-direction: column; line-height: 1.1; }
.brand__name small { font-size: 11px; font-weight: 500; opacity: .8; letter-spacing: 2px; }

.nav__menu { display: flex; gap: 30px; }
.nav__link { color: rgba(255,255,255,.9); font-weight: 500; font-size: 15px; position: relative; transition: .2s; }
.nav__link:hover { color: #fff; }
.nav__link::after { content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 2px; background: var(--green); transition: .25s; }
.nav__link:hover::after { width: 100%; }
.nav__cta { padding: 10px 22px; }

.nav__toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; }
.nav__toggle span { width: 24px; height: 2px; background: #fff; transition: .3s; }
.nav.scrolled .nav__toggle span { background: var(--navy); }

/* Hero */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; overflow: hidden; color: #fff; }
.hero__bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(900px 500px at 80% 20%, rgba(7,193,96,.35), transparent 60%),
    radial-gradient(700px 500px at 10% 90%, rgba(18,41,71,.55), transparent 55%),
    linear-gradient(135deg, var(--navy) 0%, var(--navy-2) 55%, #0a2f24 100%);
}
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 26px 26px; opacity: .5;
}
.hero__inner { position: relative; z-index: 2; padding: 120px 24px 80px; width: 100%; }
.hero__content { max-width: 720px; }
.hero__tag {
  display: inline-block; padding: 7px 16px; border-radius: 999px; font-size: 13px; font-weight: 600;
  background: rgba(7,193,96,.18); border: 1px solid rgba(7,193,96,.4); color: #9ff0c4; margin-bottom: 22px;
}
.hero__title { font-size: clamp(34px, 5.2vw, 58px); line-height: 1.15; margin-bottom: 22px; color: #fff; }
.hero__title .hl { color: var(--green); position: relative; }
.hero__sub { font-size: clamp(15px, 1.6vw, 18px); color: rgba(255,255,255,.82); max-width: 620px; margin-bottom: 34px; }
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 50px; }
.hero__stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; max-width: 620px; }
.stat strong { display: block; font-size: clamp(24px, 3vw, 34px); color: #fff; font-weight: 800; }
.stat span { font-size: 13px; color: rgba(255,255,255,.7); }
.hero__scroll {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%); z-index: 3;
  font-size: 30px; color: rgba(255,255,255,.7); animation: bounce 2s infinite;
}
@keyframes bounce { 0%,100%{transform:translate(-50%,0)} 50%{transform:translate(-50%,8px)} }

/* 通用区块 */
.section { padding: 96px 0; }
.section--tint { background: var(--bg-soft); }
.section__head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.eyebrow { display: inline-block; color: var(--green-dark); font-weight: 700; font-size: 14px; letter-spacing: 1px; margin-bottom: 12px; }
.section__title { font-size: clamp(26px, 3.4vw, 38px); }
.section__desc { color: var(--muted); margin-top: 14px; font-size: 16px; }

/* 关于 */
.about { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }
.about__text p { color: var(--muted); margin-bottom: 16px; font-size: 16px; }
.about__text strong { color: var(--navy); }
.checklist { list-style: none; margin-top: 22px; display: grid; gap: 12px; }
.checklist li { position: relative; padding-left: 30px; color: var(--ink); font-weight: 500; }
.checklist li::before { content: "✓"; position: absolute; left: 0; top: 1px; width: 20px; height: 20px; border-radius: 50%; background: var(--green-light); color: var(--green-dark); font-size: 12px; font-weight: 800; display: grid; place-items: center; }
.about__cards { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.mini-card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); transition: .25s; }
.mini-card:hover { transform: translateY(-4px); border-color: var(--green); }
.mini-card__icon { font-size: 26px; }
.mini-card h4 { font-size: 16px; margin: 10px 0 6px; }
.mini-card p { font-size: 13.5px; color: var(--muted); }

/* 卡片网格 */
.grid { display: grid; gap: 26px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; box-shadow: var(--shadow); transition: .28s; position: relative; overflow: hidden;
}
.card::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 4px; background: linear-gradient(90deg, var(--green), #10AD7A); transform: scaleX(0); transform-origin: left; transition: .3s; }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.card:hover::before { transform: scaleX(1); }
.card__icon { width: 54px; height: 54px; border-radius: 14px; background: var(--green-light); display: grid; place-items: center; font-size: 26px; margin-bottom: 16px; }
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15px; }

/* 方案 */
.plan { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 28px; box-shadow: var(--shadow); transition: .28s; display: flex; flex-direction: column; }
.plan:hover { transform: translateY(-6px); }
.plan--feature { border-color: var(--green); box-shadow: var(--shadow-lg); position: relative; }
.plan__top { margin-bottom: 14px; }
.plan__tag { display: inline-block; padding: 5px 14px; border-radius: 999px; background: var(--green-light); color: var(--green-dark); font-size: 13px; font-weight: 700; }
.plan__tag--hot { background: var(--green); color: #fff; }
.plan h3 { font-size: 22px; margin-bottom: 8px; }
.plan__desc { color: var(--muted); font-size: 14.5px; margin-bottom: 18px; }
.plan__list { list-style: none; display: grid; gap: 11px; margin-top: auto; }
.plan__list li { position: relative; padding-left: 26px; font-size: 14.5px; color: var(--ink); }
.plan__list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--green); font-weight: 800; }

/* 流程 */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.step { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 24px; box-shadow: var(--shadow); position: relative; }
.step__num { font-size: 34px; font-weight: 800; color: var(--green-light); -webkit-text-stroke: 1.5px var(--green); line-height: 1; margin-bottom: 14px; }
.step h4 { font-size: 18px; margin-bottom: 8px; }
.step p { color: var(--muted); font-size: 14.5px; }

/* 联系 */
.contact-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.contact-card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 24px; box-shadow: var(--shadow); text-align: center; transition: .28s;
}
.contact-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--green); }
.contact-card__icon { font-size: 32px; display: block; margin-bottom: 12px; }
.contact-card h4 { font-size: 16px; color: var(--green-dark); margin-bottom: 8px; }
.contact-card p { font-size: 16px; color: var(--navy); font-weight: 600; }
.contact-card small { font-size: 13px; color: var(--muted); }

/* 页脚 */
.footer { background: var(--navy); color: rgba(255,255,255,.75); padding-top: 64px; }
.footer__inner { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px; padding-bottom: 48px; }
.footer__brand p { margin-top: 16px; font-size: 14px; max-width: 320px; color: rgba(255,255,255,.6); }
.brand--light .brand__name { color: #fff; }
.brand--light .brand__name small { color: rgba(255,255,255,.6); }
.footer__col h5 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer__col a { display: block; font-size: 14px; color: rgba(255,255,255,.65); margin-bottom: 10px; transition: .2s; }
.footer__col a:hover { color: var(--green); }
.footer__bottom { border-top: 1px solid rgba(255,255,255,.1); padding: 20px 0; }
.footer__bottom .container { display: flex; justify-content: space-between; font-size: 13px; color: rgba(255,255,255,.5); flex-wrap: wrap; gap: 8px; }

/* 动画 */
.reveal { opacity: 0; transform: translateY(28px); transition: .7s cubic-bezier(.2,.7,.3,1); }
.reveal.show { opacity: 1; transform: none; }

/* 响应式 */
@media (max-width: 980px) {
  .about { grid-template-columns: 1fr; gap: 36px; }
  .contact-cards { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .brand__img { width: 36px; height: 36px; }
  .nav__menu {
    position: fixed; top: 72px; right: 0; background: #fff; flex-direction: column; gap: 0;
    width: 220px; padding: 10px 0; border-radius: 0 0 0 16px; box-shadow: var(--shadow);
    transform: translateX(120%); transition: .3s; align-items: stretch;
  }
  .nav__menu.open { transform: translateX(0); }
  .nav__menu .nav__link { color: var(--navy); padding: 14px 24px; }
  .nav__menu .nav__link::after { display: none; }
  .nav__cta { display: none; }
  .nav__toggle { display: flex; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .grid--3, .steps, .about__cards, .contact-cards { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; gap: 28px; }
  .section { padding: 64px 0; }
}