/* ==========================================================
   绿色能量站 mysl.cn — 深色生态绿高端风
   零外部依赖 · 纯 CSS + 原生 JS
   ========================================================== */

:root {
  --bg-primary: #0A1512;
  --bg-secondary: #0E1D18;
  --green: #3BE88F;
  --green-teal: #2DD4BF;
  --green-bright: #A7F3D0;
  --gold: #F5C518;
  --warn: #FACC15;
  --text-primary: #E8F5EE;
  --text-secondary: #9DB8A9;
  --border: rgba(163, 230, 201, .12);
  --glow: rgba(62, 232, 143, .35);
  --grad-main: linear-gradient(135deg, #2DD4BF, #4ADE80);
  --font-cn: -apple-system, "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: "Bahnschrift", "DIN Alternate", "Segoe UI", system-ui, sans-serif;
  --font-mono: "Consolas", "Menlo", "SF Mono", monospace;
  --nav-h: 72px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-cn);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { list-style: none; }
em { font-style: normal; }

::selection { background: var(--green); color: #04241A; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: rgba(61, 232, 143, .25); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: rgba(61, 232, 143, .45); }

:focus-visible { outline: 2px solid var(--green); outline-offset: 3px; border-radius: 4px; }

.container { width: min(1140px, 92%); margin-inline: auto; }

.desktop-only { display: inline; }

/* ---------- 玻璃拟态 ---------- */
.glass {
  background: rgba(255, 255, 255, .04);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 20px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, .35);
  position: relative;
}
.glass::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 40%;
  border-radius: 20px 20px 0 0;
  background: linear-gradient(rgba(255, 255, 255, .14), transparent 60%);
  pointer-events: none;
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .glass { background: rgba(14, 29, 24, .92); }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  position: relative;
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; flex: none; }

.btn-primary {
  background: var(--grad-main);
  color: #04241A;
  box-shadow: 0 6px 24px rgba(45, 212, 191, .28);
}
.btn-primary::after {
  content: "";
  position: absolute;
  top: 0; left: -80%;
  width: 50%; height: 100%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, .5), transparent);
  transform: skewX(-20deg);
  transition: left .6s var(--ease);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 34px rgba(45, 212, 191, .42); }
.btn-primary:hover::after { left: 130%; }

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, .18);
  color: var(--text-primary);
  background: rgba(255, 255, 255, .03);
}
.btn-ghost:hover { border-color: var(--green); color: var(--green); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0, 0, 0, .3); }

.btn-lg { padding: 15px 36px; font-size: 16px; }
.btn-sm { padding: 9px 20px; font-size: 14px; }

/* ---------- 导航栏 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background .35s, box-shadow .35s, border-color .35s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(10, 21, 18, .85);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, .35);
}
.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-logo { width: 34px; height: 34px; flex: none; }
.brand-name { font-size: 19px; font-weight: 700; letter-spacing: .04em; }

.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-link {
  padding: 8px 13px;
  font-size: 14.5px;
  color: var(--text-secondary);
  border-radius: 8px;
  position: relative;
  transition: color .25s;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 13px; right: 13px; bottom: 2px;
  height: 2px;
  border-radius: 1px;
  background: var(--grad-main);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
}
.nav-link:hover, .nav-link.active { color: var(--text-primary); }
.nav-link.active::after { transform: scaleX(1); }

.nav-cta { margin-left: 4px; }

/* 汉堡按钮 */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  margin-left: auto;
  padding: 8px;
  border-radius: 10px;
}
.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 99;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(8, 18, 14, .96);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .35s var(--ease), visibility .35s;
}
body.nav-open .mobile-menu { opacity: 1; visibility: visible; }
.mobile-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
}
.mobile-links a:not(.btn) {
  font-size: 21px;
  font-weight: 600;
  padding: 10px 24px;
  color: var(--text-secondary);
  transition: color .25s, transform .25s;
}
.mobile-links a:not(.btn):hover { color: var(--green); transform: scale(1.04); }
.mobile-cta { margin-top: 18px; font-size: 17px; padding: 14px 44px; }

body.nav-open { overflow: hidden; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 40px) 0 90px;
  overflow: hidden;
}
#particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
}
.orb-a {
  width: 560px; height: 560px;
  top: -140px; right: -120px;
  background: radial-gradient(circle, rgba(45, 212, 191, .20), transparent 70%);
  animation: orbDriftA 25s ease-in-out infinite alternate;
}
.orb-b {
  width: 620px; height: 620px;
  bottom: -220px; left: -180px;
  background: radial-gradient(circle, rgba(74, 222, 128, .16), transparent 70%);
  animation: orbDriftB 35s ease-in-out infinite alternate;
}
@keyframes orbDriftA {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(-70px, 60px) scale(1.15); }
}
@keyframes orbDriftB {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(60px, -50px) scale(1.1); }
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid rgba(61, 232, 143, .35);
  background: rgba(61, 232, 143, .08);
  color: var(--green-bright);
  font-size: 14px;
  letter-spacing: .06em;
  box-shadow: 0 0 24px rgba(61, 232, 143, .12) inset;
}
.hero-badge svg { width: 16px; height: 16px; }

.hero-title {
  margin-top: 26px;
  font-size: clamp(2.1rem, 4.6vw, 3.7rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: .02em;
}
.grad-text {
  background: linear-gradient(120deg, #A7F3D0 0%, #3BE88F 30%, #2DD4BF 55%, #A7F3D0 80%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: gradFlow 6s ease-in-out infinite;
}
@keyframes gradFlow {
  0%, 100% { background-position: 0% center; }
  50%      { background-position: 100% center; }
}

.hero-sub {
  margin-top: 22px;
  font-size: clamp(15px, 1.6vw, 17.5px);
  color: var(--text-secondary);
  max-width: 640px;
}

.hero-ctas { margin-top: 36px; display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }

.hero-trust {
  margin-top: 30px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text-secondary);
  letter-spacing: .03em;
}
.hero-trust svg { width: 16px; height: 16px; color: var(--green); flex: none; }

/* Hero 渐入 */
.hero-fade {
  opacity: 0;
  transform: translateY(22px);
  animation: heroIn .7s var(--ease) forwards;
  animation-delay: var(--d, 0s);
}
@keyframes heroIn {
  to { opacity: 1; transform: translateY(0); }
}

/* 滚动提示 */
.scroll-hint {
  position: absolute;
  bottom: 26px; left: 50%;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 1.5px solid rgba(232, 245, 238, .35);
  border-radius: 14px;
  z-index: 1;
}
.scroll-hint span {
  position: absolute;
  top: 8px; left: 50%;
  width: 4px; height: 8px;
  margin-left: -2px;
  border-radius: 2px;
  background: var(--green);
  animation: scrollDot 1.8s ease-in-out infinite;
}
@keyframes scrollDot {
  0%   { transform: translateY(0); opacity: 1; }
  70%  { transform: translateY(14px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ---------- 数据信任条 ---------- */
.stats {
  padding: 44px 0;
  background: linear-gradient(180deg, transparent, rgba(45, 212, 191, .05), transparent);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat { text-align: center; }
.stat-num {
  font-family: var(--font-num);
  font-size: clamp(1.9rem, 3.4vw, 2.7rem);
  font-weight: 700;
  letter-spacing: .01em;
  background: linear-gradient(135deg, #A7F3D0, #3BE88F);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-label { margin-top: 4px; font-size: 14px; color: var(--text-secondary); letter-spacing: .04em; }

/* ---------- Section 通用 ---------- */
.section { padding: 96px 0; position: relative; }
.section-alt {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.section-head { text-align: center; margin-bottom: 56px; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--green);
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid rgba(61, 232, 143, .3);
  background: rgba(61, 232, 143, .07);
}
.section-title {
  margin-top: 18px;
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  font-weight: 800;
  letter-spacing: .02em;
}
.section-sub { margin-top: 12px; color: var(--text-secondary); font-size: 15.5px; }

/* ---------- 服务卡片 ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.card { padding: 30px 26px; transition: transform .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease); }
.card:hover {
  transform: translateY(-6px);
  border-color: rgba(62, 232, 143, .35);
  box-shadow: 0 16px 44px rgba(0, 0, 0, .45), 0 0 30px rgba(62, 232, 143, .08);
}
.service-icon {
  width: 54px; height: 54px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 16px;
  color: var(--green);
  background: rgba(61, 232, 143, .1);
  border: 1px solid rgba(61, 232, 143, .22);
  box-shadow: 0 0 20px rgba(61, 232, 143, .15);
  transition: box-shadow .35s, transform .35s;
}
.service-icon svg { width: 27px; height: 27px; }
.service-card:hover .service-icon { box-shadow: 0 0 30px rgba(61, 232, 143, .35); transform: scale(1.06); }
.service-card h3 { margin-top: 20px; font-size: 17.5px; font-weight: 700; }
.service-card p { margin-top: 10px; font-size: 14px; color: var(--text-secondary); }

/* ---------- 价格套餐 ---------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.price-card { padding: 36px 30px; display: flex; flex-direction: column; text-align: center; }
.price-card.popular {
  border-color: rgba(245, 197, 24, .4);
  box-shadow: 0 10px 40px rgba(0, 0, 0, .45), 0 0 34px rgba(245, 197, 24, .1);
  transform: translateY(-10px);
}
.price-card.popular:hover { transform: translateY(-16px); border-color: rgba(245, 197, 24, .6); }
.popular-badge {
  position: absolute;
  top: -13px; left: 50%;
  transform: translateX(-50%);
  padding: 5px 18px;
  border-radius: 999px;
  background: linear-gradient(135deg, #F5C518, #F59E0B);
  color: #3A2A00;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .08em;
  box-shadow: 0 4px 16px rgba(245, 197, 24, .35);
  z-index: 1;
  white-space: nowrap;
}
.price-tier { font-size: 13px; color: var(--text-secondary); letter-spacing: .12em; }
.price-card h3 { margin-top: 10px; font-size: 20px; font-weight: 700; }
.price { margin-top: 14px; display: flex; align-items: baseline; justify-content: center; gap: 2px; }
.price-cur { font-size: 19px; font-weight: 700; color: var(--gold); }
.price-num {
  font-family: var(--font-num);
  font-size: 2.9rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--gold);
  text-shadow: 0 0 28px rgba(245, 197, 24, .3);
}
.price-list { margin-top: 22px; display: flex; flex-direction: column; gap: 11px; }
.price-list li {
  font-size: 14.5px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.price-list li::before {
  content: "";
  width: 15px; height: 15px;
  flex: none;
  background:
    radial-gradient(circle at center, transparent 3.5px, rgba(61, 232, 143, .9) 4px, transparent 5.5px);
  border-radius: 50%;
  border: 1.5px solid rgba(61, 232, 143, .55);
}
.price-btn { margin-top: 28px; width: 100%; }
.pricing-note { margin-top: 34px; text-align: center; font-size: 13.5px; color: var(--text-secondary); }
.pricing-custom { margin-top: 10px; text-align: center; font-size: 15px; }
.pricing-custom a { color: var(--green); font-weight: 600; border-bottom: 1px dashed rgba(61, 232, 143, .5); transition: color .25s, border-color .25s; }
.pricing-custom a:hover { color: var(--green-bright); border-color: var(--green-bright); }

/* ---------- 交易流程 ---------- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  position: relative;
  counter-reset: step;
}
.process-steps::before {
  content: "";
  position: absolute;
  top: 26px; left: 10%; right: 10%;
  border-top: 1.5px dashed rgba(61, 232, 143, .35);
}
.process-step { text-align: center; position: relative; z-index: 1; }
.step-dot {
  width: 52px; height: 52px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 1.5px solid rgba(61, 232, 143, .5);
  box-shadow: 0 0 22px rgba(61, 232, 143, .22), 0 0 0 7px var(--bg-primary);
}
.section-alt .step-dot { background: var(--bg-secondary); box-shadow: 0 0 22px rgba(61, 232, 143, .22), 0 0 0 7px var(--bg-secondary); }
.step-dot i {
  font-family: var(--font-num);
  font-style: normal;
  font-size: 19px;
  font-weight: 700;
  color: var(--green);
  text-shadow: 0 0 12px rgba(61, 232, 143, .6);
}
.process-step h3 { margin-top: 18px; font-size: 16.5px; font-weight: 700; }
.process-step p { margin-top: 8px; font-size: 13.5px; color: var(--text-secondary); }
.process-hint { display: none; }

/* ---------- 服务保障 ---------- */
.guarantee-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.guarantee-item { padding: 28px 26px; }
.guarantee-icon { width: 30px; height: 30px; color: var(--green); margin-bottom: 4px; }
.guarantee-item h3 { font-size: 16.5px; font-weight: 700; }
.guarantee-item p { margin-top: 9px; font-size: 13.5px; color: var(--text-secondary); }

/* ---------- FAQ ---------- */
.faq-container { max-width: 860px; }
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: rgba(255, 255, 255, .03);
  overflow: hidden;
  transition: border-color .3s;
}
.faq-item.open { border-color: rgba(61, 232, 143, .4); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 19px 22px;
  text-align: left;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--text-primary);
  transition: color .25s;
}
.faq-q:hover { color: var(--green); }
.faq-chevron {
  width: 18px; height: 18px;
  flex: none;
  color: var(--text-secondary);
  transition: transform .35s var(--ease);
}
.faq-item.open .faq-chevron { transform: rotate(180deg); color: var(--green); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .45s var(--ease);
}
.faq-a-inner {
  padding: 0 22px 20px;
  font-size: 14.5px;
  color: var(--text-secondary);
  border-top: 1px dashed var(--border);
  margin: 0 22px;
  padding: 16px 0 20px;
}
/* 风险提示条目 */
.faq-risk { border-color: rgba(250, 204, 21, .3); }
.faq-risk.open { border-color: rgba(250, 204, 21, .55); }
.faq-risk .faq-q { color: #FDE68A; }
.faq-risk .faq-q:hover { color: var(--warn); }
.faq-risk .faq-a-inner { color: #CBB26A; }

/* ---------- 联系我们 ---------- */
.contact-section { overflow: hidden; }
.contact-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 60px;
  align-items: center;
}
.contact-info .section-title { text-align: left; }
.contact-desc { margin-top: 14px; color: var(--text-secondary); font-size: 15.5px; }
.contact-row {
  margin-top: 22px;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.contact-label {
  font-size: 13.5px;
  color: var(--text-secondary);
  letter-spacing: .08em;
  width: 68px;
  flex: none;
}
.contact-value { font-size: 15.5px; }
.contact-value em { color: var(--green); font-weight: 600; }
.wechat-id {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--green-bright);
  padding: 6px 16px;
  border-radius: 10px;
  background: rgba(61, 232, 143, .08);
  border: 1px solid rgba(61, 232, 143, .3);
}
.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: color .25s, border-color .25s;
}
.copy-btn svg { width: 15px; height: 15px; }
.copy-btn:hover { color: var(--green); border-color: rgba(61, 232, 143, .45); }
.copy-btn.copied { color: var(--green); border-color: rgba(61, 232, 143, .6); }

.contact-qr { text-align: center; }
.qr-card {
  display: inline-block;
  padding: 18px;
  cursor: zoom-in;
  transition: transform .35s var(--ease), border-color .35s var(--ease), box-shadow .35s var(--ease);
}
.qr-card:hover {
  transform: translateY(-5px);
  border-color: rgba(61, 232, 143, .4);
  box-shadow: 0 14px 40px rgba(0, 0, 0, .5), 0 0 34px rgba(61, 232, 143, .15);
}
.qr-img {
  width: 250px; height: 250px;
  object-fit: cover;
  border-radius: 12px;
  background: #fff;
}
.qr-hint { margin-top: 12px; font-size: 13px; color: var(--text-secondary); letter-spacing: .05em; }
.qr-note { margin-top: 16px; font-size: 14.5px; color: var(--text-secondary); line-height: 1.8; }

/* 二维码放大弹窗 */
.qr-modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s, visibility .3s;
}
.qr-modal.open { opacity: 1; visibility: visible; }
.qr-modal-backdrop { position: absolute; inset: 0; background: rgba(4, 10, 8, .8); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); }
.qr-modal-box {
  position: relative;
  padding: 22px;
  width: min(90vw, 640px);
  display: flex;
  justify-content: center;
}
.qr-modal-img { width: min(80vw, 520px); height: auto; border-radius: 14px; background: #fff; }
.qr-modal-close {
  position: absolute;
  top: -16px; right: -16px;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--grad-main);
  color: #04241A;
  font-size: 22px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(0, 0, 0, .4);
}

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: #08110E;
  padding: 52px 0 36px;
}
.footer-top { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-slogan { font-size: 14.5px; color: var(--text-secondary); }
.footer-nav {
  margin-top: 30px;
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
}
.footer-nav a { font-size: 14px; color: var(--text-secondary); transition: color .25s; }
.footer-nav a:hover { color: var(--green); }
.footer-bottom { margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--border); }
.footer-bottom p { font-size: 13px; color: var(--text-secondary); }
.footer-bottom a:hover { color: var(--green); }
.footer-disclaimer { margin-top: 10px; font-size: 12.5px; opacity: .75; line-height: 1.8; }

/* ---------- 回到顶部 ---------- */
.back-top {
  position: fixed;
  right: 26px; bottom: 26px;
  z-index: 90;
  width: 46px; height: 46px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(14, 29, 24, .9);
  border: 1px solid rgba(61, 232, 143, .4);
  color: var(--green);
  box-shadow: 0 6px 24px rgba(0, 0, 0, .4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .3s, visibility .3s, transform .3s var(--ease), border-color .3s;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { border-color: var(--green); box-shadow: 0 6px 28px rgba(61, 232, 143, .25); }
.back-top svg { width: 20px; height: 20px; }

/* ---------- 滚动入场 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .hamburger { display: flex; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .guarantee-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .price-card { padding: 30px 20px; }
  .price-card.popular { transform: translateY(-6px); }
}

@media (max-width: 768px) {
  .desktop-only { display: none; }
  .section { padding: 68px 0; }
  .section-head { margin-bottom: 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px 16px; }
  .services-grid { grid-template-columns: 1fr; }
  .guarantee-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 420px; margin-inline: auto; }
  .price-card.popular { transform: none; }
  .price-card.popular:hover { transform: translateY(-6px); }
  /* 移动端交易流程：横向滑动卡片（scroll-snap），大幅压缩高度 */
  .process-steps {
    display: flex;
    gap: 12px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin-inline: -4vw;
    padding-inline: 4vw;
  }
  .process-steps::-webkit-scrollbar { display: none; }
  .process-steps::before { display: none; }
  .process-step {
    flex: 0 0 64%;
    scroll-snap-align: start;
    display: block;
    text-align: left;
    padding: 16px;
    background: rgba(255, 255, 255, .03);
    border: 1px solid var(--border);
    border-radius: 14px;
  }
  .step-dot {
    width: 34px; height: 34px;
    margin: 0 0 10px;
    box-shadow: 0 0 16px rgba(61, 232, 143, .18);
  }
  .step-dot i { font-size: 14px; }
  .process-step h3 { margin-top: 0; font-size: 15px; }
  .process-step p { margin-top: 5px; font-size: 12.5px; line-height: 1.65; }
  .process-hint {
    display: block;
    margin-top: 14px;
    text-align: center;
    font-size: 12.5px;
    color: var(--text-secondary);
    letter-spacing: .05em;
  }
  .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .contact-info .section-title { text-align: center; }
  .contact-info { text-align: center; }
  .contact-row { justify-content: center; }
  .footer-top { justify-content: center; text-align: center; }
  .hero { padding-bottom: 100px; }
  .hero-ctas { width: 100%; flex-direction: column; align-items: stretch; max-width: 340px; }
}

@media (max-width: 480px) {
  .hero-badge { font-size: 12.5px; padding: 7px 14px; }
  .hero-sub { font-size: 14.5px; }
  .hero-trust { font-size: 12.5px; letter-spacing: 0; }
  .qr-img { width: 220px; height: 220px; }
  .wechat-id { font-size: 17px; }
  .back-top { right: 16px; bottom: 16px; }
}

/* ---------- 无障碍：减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .hero-fade, .reveal { opacity: 1; transform: none; }
  #particles { display: none; }
}