/* ==========================================================================
   良心云 LiangXin Cloud — 官方网站样式表
   设计语言：云白 · 晴空 (Editorial Cloud White & Clear Sky Blue)
   官方域名：liangxin-yun.xyz
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700&family=Noto+Serif+SC:wght@700;900&display=swap');

/* ============ 设计变量：云白 · 晴空 ============ */
:root {
  --bg: #F6F9FC;          /* 纯净云白底 */
  --bg-soft: #EDF3F9;     /* 分区云雾底 */
  --card: #FFFFFF;
  --ink: #16283B;         /* 深藏青墨色 */
  --ink-2: #51637A;
  --ink-3: #8B9BAF;
  --sky: #2E76AE;         /* 晴空蓝（主强调） */
  --sky-deep: #1E567F;
  --sky-soft: #DCEBF5;    /* 浅云蓝块 */
  --sky-wash: #EAF4FB;
  --line: #E2EBF2;
  --mint: #2F9E77;        /* 价格 / 成功绿 */
  --amber: #DD8F3C;       /* 点缀橙 */
  --r-card: 22px;
  --shadow-soft: 0 2px 6px rgba(30,60,90,.04), 0 14px 34px rgba(30,60,90,.07);
  --shadow-lift: 0 8px 20px rgba(30,60,90,.07), 0 28px 60px rgba(30,60,90,.11);
  --shadow-pill: 0 4px 14px rgba(46,118,174,.15);
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

/* 基础重置 */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

::selection {
  background: var(--sky-soft);
  color: var(--sky-deep);
}

img, svg {
  display: block;
}

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

input {
  font-family: inherit;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s, border-color .2s;
}

.wrap {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 28px;
}

h1, h2, h3, .serif {
  font-family: var(--serif);
}

:focus-visible {
  outline: 2px solid var(--sky);
  outline-offset: 3px;
  border-radius: 6px;
}

.num {
  font-variant-numeric: tabular-nums;
}

/* ============ 通用按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  padding: 13px 28px;
  transition: transform .2s, box-shadow .25s, background .2s, border-color .2s;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--sky);
  color: #fff !important;
  box-shadow: 0 8px 22px rgba(46,118,174,.28);
}

.btn-primary:hover {
  background: var(--sky-deep);
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(46,118,174,.34);
}

.btn-ghost {
  background: #fff;
  border: 1.5px solid var(--line);
  color: var(--ink) !important;
  box-shadow: var(--shadow-soft);
}

.btn-ghost:hover {
  border-color: var(--sky);
  color: var(--sky) !important;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 9px 20px;
  font-size: 14px;
}

/* ============ 顶部导航 ============ */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  transition: box-shadow .3s, background .3s;
}

.nav.scrolled {
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line), 0 8px 24px rgba(30,60,90,.05);
}

.nav-in {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 28px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-weight: 900;
  font-size: 21px;
  letter-spacing: 1px;
}

.logo svg {
  width: 34px;
  height: 24px;
  fill: var(--sky);
}

.logo small {
  font-family: var(--sans);
  font-weight: 500;
  font-size: 10px;
  letter-spacing: 2.5px;
  color: var(--ink-3);
  margin-top: 6px;
}

.nav-links {
  display: flex;
  gap: 24px;
  margin-left: auto;
}

.nav-links a {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-2);
  transition: color .2s;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--sky);
  transition: width .25s;
}

.nav-links a:hover {
  color: var(--sky);
}

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

.nav-burger {
  display: none;
  margin-left: auto;
  padding: 8px;
}

.nav-drawer {
  display: none;
}

/* ============ Hero 区域 ============ */
.hero {
  position: relative;
  padding: 130px 0 0;
  overflow: hidden;
  background: linear-gradient(180deg, #E9F2F9 0%, #F3F8FC 62%, var(--bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 44px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 12.5px;
  letter-spacing: 1.5px;
  color: var(--ink-2);
  font-weight: 500;
  box-shadow: var(--shadow-soft);
}

.hero-badge .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mint);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(47,158,119,.4); }
  50% { box-shadow: 0 0 0 6px rgba(47,158,119,0); }
}

.hero h1 {
  font-size: clamp(34px, 4.4vw, 54px);
  font-weight: 900;
  line-height: 1.32;
  margin: 24px 0 18px;
  letter-spacing: .5px;
}

.hero h1 em {
  font-style: normal;
  color: var(--sky);
  position: relative;
  white-space: nowrap;
}

.hero h1 em::after {
  content: "";
  position: absolute;
  left: 2px;
  right: 2px;
  bottom: 4px;
  height: 12px;
  background: var(--sky-soft);
  z-index: -1;
  border-radius: 6px;
}

.hero p.lead {
  color: var(--ink-2);
  max-width: 520px;
  font-size: 16.5px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  margin: 32px 0 30px;
  flex-wrap: wrap;
}

.status-card {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 18px;
  box-shadow: var(--shadow-soft);
  font-size: 13.5px;
}

.status-card .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--mint);
  animation: pulse 2s infinite;
  flex: none;
}

.status-card b {
  font-weight: 700;
}

.status-card span {
  color: var(--ink-2);
}

.status-card small {
  color: var(--ink-3);
  font-size: 12px;
  margin-left: 4px;
}

/* 节点云朵交互场景 (Interactive Sky Canvas) */
.sky {
  position: relative;
  height: 480px;
  user-select: none;
}

.big-cloud {
  position: absolute;
  fill: #E0ECF5;
  opacity: .65;
  filter: blur(1px);
  animation: drift 14s ease-in-out infinite alternate;
}

.node-cloud {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  transition: transform .35s;
  will-change: transform;
}

.node-cloud svg {
  width: var(--w, 120px);
  height: auto;
  fill: #fff;
  filter: drop-shadow(0 14px 22px rgba(46,118,174,.13));
  transition: fill .3s, filter .3s, transform .35s;
}

.node-cloud:hover svg {
  transform: translateY(-7px) scale(1.03);
  filter: drop-shadow(0 22px 30px rgba(46,118,174,.18));
}

.node-cloud.sel svg {
  fill: var(--sky-wash);
  animation: bob 3.4s ease-in-out infinite;
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes drift {
  from { transform: translateX(-14px); }
  to { transform: translateX(18px); }
}

.node-label {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 13px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink-2);
  box-shadow: 0 4px 12px rgba(30,60,90,.06);
  transition: .25s;
  white-space: nowrap;
}

.node-label b {
  color: var(--sky-deep);
  font-weight: 700;
}

.node-cloud.sel .node-label {
  background: var(--sky);
  border-color: var(--sky);
  color: #fff;
}

.node-cloud.sel .node-label b {
  color: #CFE8D9;
}

.node-tip {
  position: absolute;
  top: -34px;
  background: var(--ink);
  color: #fff;
  font-size: 11.5px;
  padding: 5px 11px;
  border-radius: 8px;
  opacity: 0;
  transform: translateY(6px);
  transition: .25s;
  pointer-events: none;
  white-space: nowrap;
}

.node-cloud:hover .node-tip {
  opacity: 1;
  transform: translateY(0);
}

/* 数据带 (Data Ribbon) */
.stats {
  border-top: 1px solid var(--line);
  margin-top: 56px;
  padding: 26px 0 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 0;
}

.stat {
  flex: 1 1 160px;
  min-width: 150px;
  text-align: center;
  position: relative;
}

.stat:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 12%;
  height: 76%;
  width: 1px;
  background: var(--line);
}

.stat b {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 27px;
  display: block;
  line-height: 1.25;
  letter-spacing: .5px;
}

.stat b i {
  font-style: normal;
  color: var(--sky);
  font-size: 17px;
}

.stat span {
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 1px;
}

/* ============ 分区通用规范 ============ */
section {
  padding: 96px 0;
}

.sec-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 64px;
}

.sec-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  letter-spacing: 4px;
  color: var(--sky);
  font-weight: 700;
}

.sec-eyebrow::before, .sec-eyebrow::after {
  content: "";
  width: 26px;
  height: 1.5px;
  background: var(--sky);
  opacity: .5;
}

.sec-head h2 {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 900;
  margin-top: 14px;
  letter-spacing: .5px;
  line-height: 1.4;
}

.sec-head p {
  color: var(--ink-2);
  margin-top: 14px;
  font-size: 15.5px;
}

/* ============ 核心卖点交替块 (01 - 04) ============ */
.feature {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 74px 0;
}

.feature + .feature {
  border-top: 1px dashed var(--line);
}

.feature::before {
  content: attr(data-num);
  position: absolute;
  top: 28px;
  font-family: var(--serif);
  font-weight: 900;
  font-size: 150px;
  line-height: 1;
  color: var(--sky);
  opacity: .055;
  right: 8px;
  pointer-events: none;
}

.feature.flip::before {
  right: auto;
  left: 8px;
}

.feature.flip .f-copy {
  order: 2;
}

.feature.flip .f-visual {
  order: 1;
}

.f-tag {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: 3px;
  font-weight: 700;
  color: var(--sky);
  background: var(--sky-wash);
  border: 1px solid var(--sky-soft);
  border-radius: 999px;
  padding: 5px 14px;
  margin-bottom: 18px;
}

.f-copy h3 {
  font-size: clamp(24px, 2.6vw, 31px);
  font-weight: 900;
  line-height: 1.5;
  letter-spacing: .5px;
  margin-bottom: 16px;
}

.f-copy p {
  color: var(--ink-2);
  font-size: 15.5px;
}

.f-points {
  list-style: none;
  margin-top: 24px;
  display: grid;
  gap: 12px;
}

.f-points li {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  font-size: 14.5px;
  color: var(--ink-2);
}

.f-points li svg {
  flex: none;
  margin-top: 6px;
  width: 15px;
  height: 15px;
  stroke: var(--mint);
  stroke-width: 2.6;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.f-visual {
  max-width: 520px;
  justify-self: center;
  width: 100%;
}

/* 01 流量小票对比 (Receipt Comparison) */
.tickets {
  position: relative;
  padding: 30px 0 8px;
}

.ticket {
  background: #fff;
  border: 1.5px dashed #C9DCEA;
  border-radius: 16px;
  padding: 22px 26px;
  box-shadow: var(--shadow-soft);
  width: min(340px, 86%);
}

.ticket.a {
  transform: rotate(-2.2deg);
}

.ticket.b {
  transform: rotate(1.8deg);
  margin: -14px 0 0 auto;
  border-color: var(--mint);
  position: relative;
}

.ticket h4 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--ink-3);
}

.ticket.b h4 {
  color: var(--mint);
}

.ticket .row {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  padding: 7px 0;
  border-bottom: 1px dotted var(--line);
  color: var(--ink-2);
}

.ticket .row b {
  font-weight: 700;
  color: var(--ink);
}

.ticket .bad b {
  color: #C2554D;
}

.ticket .good b {
  color: var(--mint);
}

.ticket .mult {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 12px;
  font-weight: 700;
  font-size: 15px;
}

.mult .chip {
  font-size: 12px;
  border-radius: 999px;
  padding: 3px 12px;
}

.chip-x {
  background: #FBEDEB;
  color: #C2554D;
}

.chip-o {
  background: #E8F5EF;
  color: var(--mint);
}

/* 02 四网汇聚 SVG 网络拓扑 (Quad-Network Flow) */
.netmap {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-soft);
  padding: 26px 18px 14px;
}

.netmap .cap {
  text-align: center;
  font-size: 12.5px;
  color: var(--ink-3);
  letter-spacing: 1px;
  padding-bottom: 12px;
}

.flow {
  stroke-dasharray: 5 9;
  animation: dashmove 1.1s linear infinite;
}

@keyframes dashmove {
  to { stroke-dashoffset: -14; }
}

.hub-pulse {
  transform-origin: 530px 150px;
  animation: hubp 2.2s ease-out infinite;
}

@keyframes hubp {
  0% { transform: scale(.5); opacity: .7; }
  80% { transform: scale(1.5); opacity: 0; }
  100% { opacity: 0; }
}

/* 03 协议规格 + 零日志印章 */
.crypto {
  display: flex;
  gap: 22px;
  align-items: center;
}

.spec-stack {
  display: grid;
  gap: 14px;
  flex: 1;
}

.spec {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px 20px;
  box-shadow: var(--shadow-soft);
  display: flex;
  align-items: center;
  gap: 15px;
}

.spec .proto {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 17px;
  letter-spacing: .5px;
  min-width: 140px;
}

.spec small {
  display: block;
  font-size: 12.5px;
  color: var(--ink-3);
  line-height: 1.6;
}

.spec .live {
  margin-left: auto;
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11.5px;
  color: var(--mint);
  font-weight: 700;
}

.spec .live i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--mint);
  animation: pulse 2s infinite;
}

.seal {
  width: 132px;
  flex: none;
  animation: spin 46s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 04 通行证印章 (Global Passport with Animated Stamps) */
.passport {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-lift);
  padding: 34px 36px 38px;
  position: relative;
  overflow: hidden;
}

.passport::before {
  content: "GLOBAL PASS";
  position: absolute;
  right: -14px;
  top: 34px;
  transform: rotate(90deg);
  transform-origin: left top;
  font-size: 11px;
  letter-spacing: 5px;
  color: var(--ink-3);
  opacity: .5;
  font-weight: 700;
}

.passport h4 {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 19px;
  margin-bottom: 6px;
}

.passport > p {
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 22px;
}

.pass-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 14px;
}

.svc {
  position: relative;
  border: 1.5px solid var(--line);
  background: #F2F6FA;
  border-radius: 12px;
  padding: 9px 17px 9px 38px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-2);
  opacity: .55;
  transform: translateY(8px);
  transition: .5s;
  transition-delay: var(--d, 0s);
}

.svc svg {
  position: absolute;
  left: 13px;
  top: 50%;
  transform: translateY(-50%);
  width: 15px;
  height: 15px;
  stroke: var(--ink-3);
  stroke-width: 2.2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: .5s;
  transition-delay: var(--d, 0s);
}

.passport.in .svc {
  opacity: 1;
  transform: none;
  background: #fff;
  border-color: var(--sky-soft);
  color: var(--ink);
}

.passport.in .svc svg {
  stroke: var(--mint);
}

.svc .stamp {
  position: absolute;
  right: -9px;
  top: -11px;
  background: var(--mint);
  color: #fff;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 1px;
  border-radius: 999px;
  padding: 2.5px 9px;
  box-shadow: 0 4px 10px rgba(47,158,119,.35);
  transform: scale(2.2) rotate(-24deg);
  opacity: 0;
  transition: .45s cubic-bezier(.2, 1.5, .4, 1);
  transition-delay: calc(var(--d, 0s) + .3s);
}

.passport.in .svc .stamp {
  transform: scale(1) rotate(-7deg);
  opacity: 1;
}

/* ============ 价格区 (Pricing Matrix) ============ */
.pricing {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.cycle-seg {
  display: flex;
  background: #DDE8F1;
  border-radius: 999px;
  padding: 5px;
  width: max-content;
  margin: 0 auto 52px;
  position: relative;
}

.cycle-seg button {
  position: relative;
  z-index: 1;
  border-radius: 999px;
  padding: 10px 30px;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--ink-2);
  transition: color .25s;
  white-space: nowrap;
}

.cycle-seg button small {
  font-size: 11px;
  font-weight: 500;
  margin-left: 5px;
  color: var(--mint);
}

.cycle-seg button.on {
  color: var(--sky-deep);
}

.cycle-thumb {
  position: absolute;
  top: 5px;
  bottom: 5px;
  left: 5px;
  background: #fff;
  border-radius: 999px;
  box-shadow: 0 3px 10px rgba(30,60,90,.12);
  transition: transform .35s cubic-bezier(.3, 1.2, .4, 1);
  width: calc((100% - 10px) / 3);
}

.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  align-items: stretch;
}

.plan {
  position: relative;
  background: #fff;
  border: 1.5px solid var(--line);
  border-radius: var(--r-card);
  padding: 38px 32px 34px;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}

.plan:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lift);
}

.plan.pop {
  border-color: var(--sky);
  box-shadow: 0 10px 26px rgba(46,118,174,.12), 0 30px 64px rgba(46,118,174,.12);
  transform: translateY(-14px);
}

.plan.pop:hover {
  transform: translateY(-20px);
}

.pop-tag {
  position: absolute;
  top: -17px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--sky);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 6px 18px;
  border-radius: 999px;
  box-shadow: 0 6px 16px rgba(46,118,174,.35);
  white-space: nowrap;
}

.plan h3 {
  font-size: 20px;
  font-weight: 900;
  letter-spacing: .5px;
}

.plan .pos {
  font-size: 12.5px;
  color: var(--ink-3);
  margin-top: 3px;
}

.price-line {
  margin: 22px 0 4px;
  display: flex;
  align-items: baseline;
  gap: 3px;
}

.price-line .cur {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 900;
  color: var(--sky-deep);
}

.price-line .price-num {
  font-family: var(--serif);
  font-size: 46px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -.5px;
  color: var(--ink);
}

.price-line .unit {
  color: var(--ink-3);
  font-size: 14px;
  margin-left: 5px;
}

.price-per {
  font-size: 12.5px;
  color: var(--mint);
  min-height: 22px;
  font-weight: 500;
}

.plan .quota {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 26px;
  margin: 16px 0 4px;
}

.plan .quota i {
  font-style: normal;
  font-size: 14px;
  color: var(--ink-3);
  font-family: var(--sans);
  font-weight: 400;
  margin-left: 6px;
}

.plan ul {
  list-style: none;
  margin: 18px 0 26px;
  display: grid;
  gap: 10px;
  flex: 1;
}

.plan ul li {
  display: flex;
  gap: 10px;
  font-size: 13.5px;
  color: var(--ink-2);
}

.plan ul li svg {
  flex: none;
  margin-top: 6px;
  width: 14px;
  height: 14px;
  stroke: var(--sky);
  stroke-width: 2.6;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.plan .btn {
  justify-content: center;
  width: 100%;
}

/* 不限时加油包 (Booster Box) */
.booster {
  margin-top: 26px;
  background: #fff;
  border: 1.5px dashed #C9DCEA;
  border-radius: var(--r-card);
  padding: 26px 34px;
  display: flex;
  align-items: center;
  gap: 26px;
  flex-wrap: wrap;
  box-shadow: var(--shadow-soft);
}

.booster .bq {
  font-family: var(--serif);
  font-weight: 900;
  font-size: 24px;
  white-space: nowrap;
}

.booster .bq i {
  font-style: normal;
  font-size: 13px;
  color: var(--ink-3);
  font-family: var(--sans);
  font-weight: 400;
  margin-left: 6px;
}

.booster p {
  font-size: 13.5px;
  color: var(--ink-2);
  flex: 1;
  min-width: 240px;
}

.booster .price-line {
  margin: 0;
}

/* ============ 优惠福利卡片 (Promo / Coupon Box) ============ */
.coupons-box {
  margin-top: 28px;
  background: #fff;
  border: 1.5px solid var(--sky-soft);
  border-radius: var(--r-card);
  padding: 24px 32px;
  box-shadow: var(--shadow-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.coupons-info h4 {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 900;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}

.coupons-info p {
  font-size: 13.5px;
  color: var(--ink-2);
  margin-top: 3px;
}

.coupons-action {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.code-pill {
  background: var(--sky-wash);
  border: 1.5px dashed var(--sky);
  padding: 6px 16px;
  border-radius: 999px;
  font-family: monospace;
  font-size: 14px;
  font-weight: 800;
  color: var(--sky-deep);
  letter-spacing: 1px;
}

/* ============ 客户端 & 三步连接 ============ */
.platforms {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 66px;
}

.plat {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 9px 20px;
  font-size: 13.5px;
  font-weight: 500;
  box-shadow: var(--shadow-soft);
  transition: .25s;
}

.plat:hover {
  transform: translateY(-3px);
  border-color: var(--sky-soft);
}

.plat b {
  font-weight: 700;
}

.plat span {
  font-size: 11.5px;
  color: var(--ink-3);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  position: relative;
}

.steps::before {
  content: "";
  position: absolute;
  top: 33px;
  left: 12%;
  right: 12%;
  border-top: 2px dashed var(--sky-soft);
  z-index: 0;
}

.step {
  position: relative;
  z-index: 1;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 30px 28px 32px;
  box-shadow: var(--shadow-soft);
  text-align: center;
  transition: transform .3s, box-shadow .3s;
}

.step:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lift);
}

.step .no {
  width: 52px;
  height: 52px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: var(--sky);
  color: #fff;
  font-family: var(--serif);
  font-weight: 900;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 18px rgba(46,118,174,.3);
}

.step h4 {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 900;
  margin-bottom: 8px;
}

.step p {
  font-size: 13.5px;
  color: var(--ink-2);
  margin-bottom: 20px;
}

/* 迷你连接交互开关 (Interactive Switch Demo) */
.connect-demo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.switch {
  width: 64px;
  height: 34px;
  border-radius: 999px;
  background: #D6E1EA;
  position: relative;
  transition: background .3s;
  cursor: pointer;
}

.switch::after {
  content: "";
  position: absolute;
  top: 4px;
  left: 4px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 6px rgba(0,0,0,.18);
  transition: transform .3s cubic-bezier(.3, 1.3, .4, 1);
}

.switch.on {
  background: var(--mint);
}

.switch.on::after {
  transform: translateX(30px);
}

.connect-demo .st {
  font-size: 12.5px;
  color: var(--ink-3);
  transition: color .3s;
  font-weight: 500;
}

.connect-demo .st.on {
  color: var(--mint);
}

/* ============ 行业资讯与深度指南 (Topical Authority Hub) ============ */
.guides-sec {
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.guides-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.guide-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-card);
  padding: 30px 28px;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}

.guide-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lift);
  border-color: var(--sky-soft);
}

.guide-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--ink-3);
  margin-bottom: 14px;
}

.guide-meta .tag {
  color: var(--sky);
  background: var(--sky-wash);
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 700;
}

.guide-item h3 {
  font-size: 18px;
  font-weight: 900;
  line-height: 1.45;
  margin-bottom: 10px;
}

.guide-item p {
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 18px;
}

.guide-link {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--sky);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.guide-link:hover {
  color: var(--sky-deep);
}

/* ============ 用户真实口碑无尽跑马灯 (Endless Marquee Reviews) ============ */
.reviews-section {
  padding: 96px 0;
  overflow: hidden;
  position: relative;
}

.trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 38px;
}

.trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  border-radius: 999px;
  padding: 7px 20px;
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink);
}

.stars-gold {
  color: #F5A623;
  letter-spacing: 2px;
}

.marquee-container {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
  padding: 8px 0;
}

.marquee-track {
  display: flex;
  gap: 20px;
  width: max-content;
}

.marquee-track-left {
  animation: scrollLeft 55s linear infinite;
}

.marquee-track-right {
  animation: scrollRight 60s linear infinite;
}

.marquee-track:hover {
  animation-play-state: paused;
}

@keyframes scrollLeft {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

@keyframes scrollRight {
  0% { transform: translateX(-50%); }
  100% { transform: translateX(0); }
}

.review-card {
  width: 320px;
  flex-shrink: 0;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  border-radius: 18px;
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform .25s, box-shadow .25s;
}

.review-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.review-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 10px;
}

.avatar-badge {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--sky-wash);
  color: var(--sky-deep);
  font-family: var(--serif);
  font-weight: 900;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--sky-soft);
}

.u-name {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
}

.u-verified {
  font-size: 11px;
  color: var(--mint);
  font-weight: 500;
}

.review-stars {
  color: #F5A623;
  font-size: 12px;
  letter-spacing: 1px;
}

.review-body {
  font-size: 13px;
  color: var(--ink-2);
  line-height: 1.65;
}

/* ============ FAQ 常见问题 ============ */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  transition: box-shadow .3s, border-color .3s;
}

.faq-item.open {
  border-color: var(--sky-soft);
  box-shadow: var(--shadow-soft);
}

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  text-align: left;
  padding: 19px 24px;
  font-size: 15.5px;
  font-weight: 700;
  font-family: var(--serif);
}

.faq-q .no {
  flex: none;
  font-size: 12px;
  color: var(--sky);
  font-family: var(--sans);
  font-weight: 700;
  letter-spacing: 1px;
}

.faq-q svg {
  margin-left: auto;
  flex: none;
  width: 16px;
  height: 16px;
  stroke: var(--ink-3);
  stroke-width: 2.2;
  fill: none;
  stroke-linecap: round;
  transition: transform .3s;
}

.faq-item.open .faq-q svg {
  transform: rotate(45deg);
  stroke: var(--sky);
}

.faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .38s cubic-bezier(.4, 0, .2, 1);
}

.faq-item.open .faq-a {
  grid-template-rows: 1fr;
}

.faq-a > div {
  overflow: hidden;
}

.faq-a p {
  padding: 0 24px 22px 24px;
  font-size: 14.5px;
  color: var(--ink-2);
}

/* ============ 收尾大标语 ============ */
.finale {
  position: relative;
  text-align: center;
  padding: 120px 0 130px;
  overflow: hidden;
}

.finale .bg-cloud {
  position: absolute;
  fill: #E3EDF5;
  opacity: .7;
  left: -120px;
  bottom: -60px;
  width: 520px;
  animation: drift 18s ease-in-out infinite alternate;
}

.finale h2 {
  font-size: clamp(32px, 5.2vw, 58px);
  font-weight: 900;
  letter-spacing: 1px;
  line-height: 1.4;
}

.finale h2 em {
  font-style: normal;
  color: var(--sky);
}

.finale p {
  color: var(--ink-2);
  margin: 20px auto 34px;
  font-size: 15.5px;
  max-width: 460px;
}

/* ============ 页脚 ============ */
footer {
  background: #122436;
  color: #B9C8D6;
  padding: 70px 0 36px;
}

.foot-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 44px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}

.foot-brand .logo {
  color: #fff;
}

.foot-brand .logo svg {
  fill: #7FB3D9;
}

.foot-brand p {
  font-size: 13px;
  margin-top: 16px;
  max-width: 300px;
  line-height: 1.9;
  color: #8FA3B6;
}

.foot-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  font-size: 12.5px;
  color: #9FD8BC;
}

.foot-status i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #38C08A;
  animation: pulse 2s infinite;
}

.foot-col h5 {
  color: #fff;
  font-size: 13.5px;
  letter-spacing: 2px;
  margin-bottom: 18px;
  font-weight: 700;
}

.foot-col a {
  display: block;
  font-size: 13.5px;
  color: #8FA3B6;
  padding: 5px 0;
  transition: color .2s;
}

.foot-col a:hover {
  color: #fff;
}

.foot-bottom {
  padding-top: 26px;
  font-size: 12px;
  color: #6E8298;
  line-height: 2;
}

.foot-bottom .copy {
  margin-top: 10px;
  color: #8FA3B6;
}

/* ============ 下单模态框 ============ */
.modal-mask {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(18, 36, 54, .45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s;
}

.modal-mask.show {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  background: #fff;
  border-radius: 24px;
  width: 440px;
  max-width: 100%;
  max-height: 90vh;
  overflow: auto;
  box-shadow: 0 40px 100px rgba(10,30,50,.35);
  transform: translateY(24px) scale(.97);
  transition: transform .35s cubic-bezier(.3, 1.2, .4, 1);
}

.modal-mask.show .modal {
  transform: none;
}

.modal-in {
  padding: 34px 34px 30px;
  position: relative;
}

.modal-x {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: .2s;
}

.modal-x:hover {
  background: var(--sky-soft);
}

.modal-x svg {
  width: 14px;
  height: 14px;
  stroke: var(--ink-2);
  stroke-width: 2.4;
  stroke-linecap: round;
}

.mo-eyebrow {
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--sky);
  font-weight: 700;
}

.mo-title {
  font-size: 24px;
  font-weight: 900;
  margin: 6px 0 22px;
}

.mo-summary {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 20px;
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
}

.mo-summary > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13.5px;
}

.mo-summary span {
  color: var(--ink-3);
}

.mo-summary b {
  font-weight: 700;
}

.mo-cycle {
  display: flex;
  gap: 6px;
}

.mo-cycle button {
  border: 1.5px solid var(--line);
  border-radius: 999px;
  padding: 5px 13px;
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-2);
  transition: .2s;
}

.mo-cycle button.on {
  border-color: var(--sky);
  background: var(--sky-wash);
  color: var(--sky-deep);
}

.modal label {
  display: block;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--ink-2);
  margin: 16px 0 8px;
  letter-spacing: 1px;
}

.mo-pay {
  display: flex;
  gap: 9px;
  flex-wrap: wrap;
}

.mo-pay button {
  border: 1.5px solid var(--line);
  border-radius: 12px;
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-2);
  transition: .2s;
}

.mo-pay button.on {
  border-color: var(--sky);
  background: var(--sky-wash);
  color: var(--sky-deep);
  font-weight: 700;
}

.modal input[type=email] {
  width: 100%;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 14px;
  background: var(--bg);
  transition: border-color .2s;
}

.modal input[type=email]:focus {
  outline: none;
  border-color: var(--sky);
  background: #fff;
}

.modal input.err {
  border-color: #C2554D;
  animation: shake .35s;
}

@keyframes shake {
  25% { transform: translateX(-5px); }
  75% { transform: translateX(5px); }
}

.mo-total {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin: 22px 0 18px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}

.mo-total span {
  font-size: 13.5px;
  color: var(--ink-2);
}

.mo-total b {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 900;
  color: var(--sky-deep);
}

.mo-submit {
  width: 100%;
  justify-content: center;
}

.mo-note {
  text-align: center;
  font-size: 11.5px;
  color: var(--ink-3);
  margin-top: 12px;
}

.mo-success {
  text-align: center;
  padding: 14px 0 6px;
}

.mo-success .ok-ring {
  width: 76px;
  height: 76px;
  margin: 0 auto 20px;
}

.mo-success h4 {
  font-size: 21px;
  font-weight: 900;
  margin-bottom: 8px;
}

.mo-success .oid {
  font-size: 13px;
  color: var(--ink-3);
  margin-bottom: 16px;
}

.mo-success .oid b {
  color: var(--ink);
}

.mo-success p {
  font-size: 12.5px;
  color: var(--ink-3);
  margin-bottom: 24px;
}

.ok-circle {
  stroke: var(--mint);
  stroke-width: 2.5;
  fill: none;
  stroke-dasharray: 220;
  stroke-dashoffset: 220;
  animation: draw .7s .1s ease forwards;
}

.ok-check {
  stroke: var(--mint);
  stroke-width: 3;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-dasharray: 60;
  stroke-dashoffset: 60;
  animation: draw .45s .65s ease forwards;
}

@keyframes draw {
  to { stroke-dashoffset: 0; }
}

/* ============ Toast 提示 ============ */
.toast {
  position: fixed;
  bottom: 34px;
  left: 50%;
  transform: translate(-50%, 80px);
  z-index: 300;
  background: var(--ink);
  color: #fff;
  font-size: 13.5px;
  padding: 12px 24px;
  border-radius: 999px;
  box-shadow: 0 14px 34px rgba(10,30,50,.3);
  opacity: 0;
  transition: .35s cubic-bezier(.3, 1.2, .4, 1);
  display: flex;
  align-items: center;
  gap: 9px;
  max-width: 88vw;
  pointer-events: none;
}

.toast.show {
  transform: translate(-50%, 0);
  opacity: 1;
}

.toast svg {
  width: 15px;
  height: 15px;
  stroke: #6FD7A8;
  stroke-width: 2.6;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

/* ============ 滚动入场效果 ============ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .8s ease, transform .8s cubic-bezier(.2, .7, .3, 1);
  transition-delay: var(--d, 0s);
}

.reveal.in {
  opacity: 1;
  transform: none;
}

/* ============ 响应式适配 ============ */
@media (max-width: 960px) {
  .nav-links {
    display: none;
  }
  .nav-burger {
    display: block;
  }
  .nav-drawer {
    display: block;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 40px rgba(30,60,90,.08);
    padding: 10px 28px 20px;
    transform: translateY(-110%);
    transition: transform .35s;
    z-index: 99;
  }
  .nav-drawer.open {
    transform: none;
  }
  .nav-drawer a {
    display: block;
    padding: 12px 0;
    font-weight: 500;
    border-bottom: 1px solid var(--bg-soft);
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .sky {
    height: 360px;
  }
  .feature {
    grid-template-columns: 1fr;
    gap: 36px;
    padding: 60px 0;
  }
  .feature.flip .f-copy {
    order: 1;
  }
  .feature.flip .f-visual {
    order: 2;
  }
  .feature::before {
    font-size: 100px;
  }
  .plans {
    grid-template-columns: 1fr;
    max-width: 460px;
    margin: 0 auto;
  }
  .plan.pop {
    transform: none;
  }
  .plan.pop:hover {
    transform: translateY(-6px);
  }
  .steps {
    grid-template-columns: 1fr;
    max-width: 460px;
    margin: 0 auto;
  }
  .steps::before {
    display: none;
  }
  .guides-grid {
    grid-template-columns: 1fr;
    max-width: 460px;
    margin: 0 auto;
  }
  .foot-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .wrap {
    padding: 0 20px;
  }
  .stats {
    gap: 20px 0;
  }
  .stat {
    flex-basis: 46%;
  }
  .stat:nth-child(odd)::after {
    display: none;
  }
  .crypto {
    flex-direction: column;
  }
  .booster {
    flex-direction: column;
    align-items: flex-start;
  }
  .coupons-box {
    flex-direction: column;
    align-items: flex-start;
  }
  .foot-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}