/* ============ 快连VPN 蓝紫渐变主题（参考 LetsVPN 设计语言） ============ */
:root {
  --lv-primary: #4dabf7;
  --lv-deep: #9147f1;
  --lv-accent: #e841a5;
  --lv-pink: #b441d3;
  --lv-grad: linear-gradient(135deg, #4dabf7, #9147f1 55%, #e841a5);
  --lv-ink: #1f2937;
  --lv-mut: #6b7280;
  --lv-dim: #9ca3af;
  --lv-line: #eef0f6;
  --lv-bg: #fafaff;
  --lv-card: #ffffff;
  --lv-r: 16px;
  --lv-sh: 0 8px 30px rgba(145, 71, 241, .15);
  --lv-f: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--lv-f); color: var(--lv-ink); background: var(--lv-bg); line-height: 1.7; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.lv-shell { width: min(1140px, 92%); margin: 0 auto; }

/* Header 紫色渐变（与 hero 同色系） */
.lv-header { position: sticky; top: 0; z-index: 80; background: transparent; }
.lv-row { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.lv-brand { display: inline-flex; align-items: center; font-weight: 800; font-size: 20px; color: #fff; }
.lv-brand img { margin-right: 8px; height: 36px; width: auto; object-fit: contain; }
.lv-brand b { color: #fff; font-weight: 900; }
.lv-nav { display: flex; gap: 26px; font-size: 14.5px; color: rgba(255,255,255,.88); }
.lv-nav a:hover { color: #fff; }
/* header 内按钮在紫色渐变底上的适配 */
.lv-header .lv-pill-line { color: #fff; border: 1.5px solid rgba(255,255,255,.8); }
.lv-header .lv-pill-line:hover { background: rgba(255,255,255,.15); }
.lv-header .lv-pill-fill { background: #fff; color: var(--lv-deep); box-shadow: 0 4px 14px rgba(0,0,0,.18); }
.lv-header .lv-pill-fill:hover { background: #f5f3ff; box-shadow: 0 6px 18px rgba(0,0,0,.25); }
.lv-pill { display: inline-flex; align-items: center; gap: 6px; border-radius: 10px; font-weight: 700; cursor: pointer; border: none; transition: all .22s; white-space: nowrap; }
.lv-pill-s { padding: 9px 18px; font-size: 13px; }
.lv-pill-m { padding: 13px 28px; font-size: 14.5px; }
.lv-pill-fill { background: var(--lv-grad); color: #fff; box-shadow: 0 6px 18px rgba(145, 71, 241, .35); }
.lv-pill-fill:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(145, 71, 241, .45); }
.lv-pill-line { background: transparent; color: var(--lv-deep); border: 1.5px solid var(--lv-deep); }
.lv-pill-line:hover { background: rgba(145, 71, 241, .08); }
.lv-pill-pale { background: #fff; color: var(--lv-deep); box-shadow: 0 8px 22px rgba(2, 6, 23, .12); }

/* Hero 紫色渐变 左右结构 */
.lv-hero { padding: 134px 0 80px; margin-top: -64px; background: linear-gradient(135deg, #4dabf7 0%, #9147f1 50%, #e841a5 100%); position: relative; overflow: hidden; }
.lv-hero::after { content: ''; position: absolute; bottom: -120px; left: -120px; width: 420px; height: 420px; border-radius: 50%; background: radial-gradient(circle, rgba(79,70,229,.3), transparent 70%); }
.lv-hero-in { position: relative; z-index: 1; display: grid; grid-template-columns: 5fr 6fr; gap: 40px; align-items: center; }
.lv-hero-img { display: flex; justify-content: center; align-items: center; }
.lv-hero-collage { display: grid; grid-template-columns: 1fr; gap: 14px; width: 56%; margin: 0 auto; }
.lv-hero-collage img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: 14px; box-shadow: 0 8px 24px rgba(0,0,0,.3); border: 2px solid rgba(255,255,255,.3); transition: transform .3s; }
.lv-hero-collage img:hover { transform: scale(1.03); }
.lv-pill-tag { display: inline-flex; gap: 7px; align-items: center; font-size: 12.5px; font-weight: 700; color: #fff; background: rgba(255,255,255,.18); border: 1px solid rgba(255,255,255,.4); padding: 6px 16px; border-radius: 999px; }
.lv-hero h1 { font-size: clamp(32px, 4.6vw, 52px); font-weight: 900; line-height: 1.2; letter-spacing: -.8px; margin: 18px 0 20px; color: #fff; }
.lv-hero h1 b { color: #fff; }
.lv-hero-lead { font-size: 16px; color: rgba(255,255,255,.9); margin-bottom: 30px; max-width: 520px; }
.lv-hero-lead b { color: #fff; }
.lv-hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }
.lv-hero-note { font-size: 13.5px; color: rgba(255,255,255,.75); margin-top: 18px; }
.lv-hero .lv-pill-fill { background: #fff; color: var(--lv-deep); box-shadow: 0 8px 24px rgba(0,0,0,.2); }
.lv-hero .lv-pill-fill:hover { background: #f5f3ff; }
.lv-hero .lv-pill-line { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.7); }
.lv-hero .lv-pill-line:hover { background: rgba(255,255,255,.12); }

/* 右侧电脑桌面客户端窗口卡片 */
.lv-phone { width: 420px; margin: 0 auto; background: #fff; border-radius: 14px; box-shadow: 0 30px 70px rgba(0,0,0,.35); overflow: hidden; }
.lv-window-bar { display: flex; align-items: center; justify-content: space-between; padding: 12px 16px; background: #f1f3f8; border-bottom: 1px solid #e5e7eb; }
.lv-window-bar .dots { display: flex; gap: 6px; }
.lv-window-bar .dots i { width: 12px; height: 12px; border-radius: 50%; display: block; }
.lv-window-bar .dots i:nth-child(1) { background: #f87171; }
.lv-window-bar .dots i:nth-child(2) { background: #fbbf24; }
.lv-window-bar .dots i:nth-child(3) { background: #34d399; }
.lv-window-bar .title { font-size: 12.5px; color: #6b7280; font-weight: 600; }
.lv-phone-screen { background: #f6f7fb; padding: 20px 18px; }
.lv-phone-connect { display: flex; align-items: center; gap: 16px; padding: 10px 8px 16px; }
.lv-phone-connect .power { width: 60px; height: 60px; border-radius: 50%; background: var(--lv-grad); display: grid; place-items: center; color: #fff; font-size: 22px; box-shadow: 0 10px 26px rgba(96,80,240,.4); flex-shrink: 0; }
.lv-phone-connect .info { flex: 1; }
.lv-phone-connect .st { font-weight: 800; font-size: 16px; color: #1f2937; }
.lv-phone-connect .sub { font-size: 12px; color: #9ca3af; margin-top: 2px; }
.lv-phone-node { display: flex; align-items: center; justify-content: space-between; padding: 11px 12px; background: #fff; border-radius: 10px; margin-top: 8px; }
.lv-phone-node .left { display: flex; align-items: center; gap: 10px; }
.lv-phone-node .flag { font-size: 20px; }
.lv-phone-node .nm { font-size: 13.5px; font-weight: 700; color: #1f2937; }
.lv-phone-node .lat { font-size: 12px; color: #16a34a; font-weight: 700; }
.lv-phone-node.active { border: 1.5px solid var(--lv-deep); }

/* 数据条 */
.lv-databar { display: flex; gap: 36px; flex-wrap: wrap; margin-top: 40px; }
.lv-databar .item { text-align: left; }
.lv-databar .item b { font-size: 30px; font-weight: 900; display: block; color: #fff; }
.lv-databar .item span { font-size: 13px; color: rgba(255,255,255,.8); }

/* 内容区 */
.lv-sec { padding: 80px 0; }
.lv-sec-alt { background: #fff; }
.lv-sec-head { text-align: center; max-width: 640px; margin: 0 auto 48px; }
.lv-sec-head h2 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; letter-spacing: -.4px; margin-bottom: 12px; }
.lv-sec-head p { color: var(--lv-mut); font-size: 15.5px; }
.lv-lab { display: inline-block; font-size: 12px; font-weight: 800; letter-spacing: 2px; color: var(--lv-deep); text-transform: uppercase; margin-bottom: 14px; }

/* 节点列表 */
.lv-countries { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.lv-country { background: #fff; border: 1px solid var(--lv-line); border-radius: var(--lv-r); padding: 20px 12px; text-align: center; transition: all .25s; }
.lv-country:hover { transform: translateY(-4px); box-shadow: var(--lv-sh); border-color: rgba(145, 71, 241, .4); }
.lv-country .flag { font-size: 34px; display: block; margin-bottom: 8px; }
.lv-country .nm { font-weight: 700; font-size: 14px; }
.lv-country .ct { font-size: 11.5px; color: var(--lv-dim); }

/* 功能卡（4列） */
.lv-grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.lv-card { background: #fff; border: 1px solid var(--lv-line); border-radius: var(--lv-r); padding: 28px 22px; transition: all .3s; }
.lv-card:hover { transform: translateY(-5px); box-shadow: var(--lv-sh); border-color: rgba(145, 71, 241, .4); }
.lv-card .ico { font-size: 34px; margin-bottom: 14px; }
.lv-card h3 { font-size: 16.5px; font-weight: 800; margin-bottom: 8px; }
.lv-card p { color: var(--lv-mut); font-size: 13.8px; }

/* 为什么选择（5列） */
.lv-grid5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.lv-point { background: #fff; border: 1px solid var(--lv-line); border-radius: var(--lv-r); padding: 26px 18px; text-align: center; transition: all .3s; }
.lv-point:hover { transform: translateY(-5px); box-shadow: var(--lv-sh); }
.lv-point .ico { font-size: 32px; margin-bottom: 12px; }
.lv-point h3 { font-size: 15.5px; font-weight: 800; margin-bottom: 6px; }
.lv-point p { color: var(--lv-mut); font-size: 13px; }

/* 用户评价卡片 */
.lv-reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.lv-review { background: #fff; border: 1px solid var(--lv-line); border-radius: var(--lv-r); padding: 26px 22px; }
.lv-review .stars { color: #fbbf24; font-size: 16px; margin-bottom: 10px; }
.lv-review p { color: var(--lv-mut); font-size: 14px; margin-bottom: 14px; }
.lv-review .who { display: flex; align-items: center; gap: 10px; }
.lv-review .who .av { width: 36px; height: 36px; border-radius: 50%; background: var(--lv-grad); display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 14px; }
.lv-review .who .nm { font-size: 13.5px; font-weight: 700; color: #1f2937; }
.lv-review .who .role { font-size: 12px; color: var(--lv-dim); }

/* 多设备横幅 */
.lv-device { background: var(--lv-grad); color: #fff; border-radius: 18px; padding: 44px 40px; display: flex; gap: 30px; align-items: center; justify-content: space-between; flex-wrap: wrap; box-shadow: 0 16px 40px rgba(145, 71, 241, .25); }
.lv-device h3 { font-size: 24px; font-weight: 800; margin-bottom: 10px; }
.lv-device p { color: rgba(255,255,255,.94); font-size: 15px; max-width: 540px; }
.lv-device .badges { display: flex; gap: 10px; flex-wrap: wrap; }
.lv-device .badge { background: rgba(255,255,255,.22); border: 1px solid rgba(255,255,255,.4); padding: 8px 16px; border-radius: 999px; font-size: 13px; font-weight: 700; }

/* 价格 */
.lv-plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.lv-plan { background: #fff; border: 1px solid var(--lv-line); border-radius: 18px; padding: 30px 26px; display: flex; flex-direction: column; position: relative; transition: all .3s; }
.lv-plan:hover { transform: translateY(-5px); box-shadow: var(--lv-sh); }
.lv-plan.featured { border: 2px solid var(--lv-deep); box-shadow: 0 16px 40px rgba(145, 71, 241, .16); }
.lv-plan .lv-reco { position: absolute; top: -13px; left: 50%; transform: translateX(-50%); background: var(--lv-grad); color: #fff; font-size: 11.5px; font-weight: 800; padding: 5px 14px; border-radius: 999px; white-space: nowrap; }
.lv-plan h3 { font-size: 16px; font-weight: 800; }
.lv-plan .lv-desc { font-size: 12.5px; color: var(--lv-dim); margin-bottom: 14px; }
.lv-price-line { display: flex; align-items: baseline; gap: 5px; }
.lv-price-line .lv-sym { font-size: 16px; font-weight: 800; }
.lv-price-line b { font-size: 40px; font-weight: 800; letter-spacing: -1px; color: var(--lv-deep); }
.lv-price-line small { font-size: 12.5px; color: var(--lv-dim); }
.lv-plan .lv-total { font-size: 12.5px; color: var(--lv-mut); margin: 4px 0 14px; }
.lv-plan ul { flex: 1; margin-bottom: 20px; }
.lv-plan li { font-size: 13.8px; color: var(--lv-mut); padding: 6px 0; display: flex; gap: 8px; }
.lv-plan li:before { content: "✔"; color: var(--lv-deep); font-weight: 800; }

/* 平台卡 */
.lv-platforms { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.lv-platform { background: #fff; border: 1px solid var(--lv-line); border-radius: var(--lv-r); padding: 28px 20px; text-align: center; transition: all .3s; }
.lv-platform:hover { transform: translateY(-5px); box-shadow: var(--lv-sh); }
.lv-platform .lv-os { font-size: 42px; margin-bottom: 10px; }
.lv-platform h3 { font-size: 16.5px; font-weight: 800; }
.lv-platform .lv-ver { font-size: 12.5px; color: var(--lv-dim); margin: 4px 0 16px; }

/* FAQ */
.lv-faq { max-width: 760px; margin: 0 auto; }
.lv-faq-item { background: #fff; border: 1px solid var(--lv-line); border-radius: var(--lv-r); margin-bottom: 12px; overflow: hidden; }
.lv-faq-q { padding: 18px 22px; font-weight: 700; cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.lv-faq-q:hover { color: var(--lv-deep); }
.lv-faq-a { padding: 0 22px 18px; color: var(--lv-mut); font-size: 14.5px; display: none; }
.lv-faq-item.open .lv-faq-a { display: block; }
.lv-faq-item.open .lv-faq-q { color: var(--lv-deep); }

/* 子页头 紫色渐变 */
.lv-subhead { padding: 128px 0 56px; margin-top: -64px; text-align: center; background: linear-gradient(135deg, #4dabf7 0%, #9147f1 50%, #e841a5 100%); }
.lv-subhead h1 { font-size: clamp(28px, 3.6vw, 42px); font-weight: 900; margin: 14px 0 10px; color: #fff; }
.lv-subhead p { color: rgba(255,255,255,.85); max-width: 560px; margin: 0 auto; }

/* 文章 */
.lv-article { max-width: 760px; margin: 0 auto; }
.lv-article h2 { font-size: 22px; font-weight: 800; margin: 28px 0 12px; }
.lv-article p { color: var(--lv-mut); margin-bottom: 14px; }
.lv-article strong { color: var(--lv-deep); }
.lv-article ul, .lv-article ol { margin: 0 0 16px 20px; }
.lv-article li { color: var(--lv-mut); margin-bottom: 8px; }
.lv-refund { display: flex; gap: 14px; background: #eef2ff; border: 1px solid #c7d2fe; border-radius: var(--lv-r); padding: 20px 22px; margin-top: 28px; font-size: 14px; color: var(--lv-mut); }

/* Final CTA 深紫 */
.lv-bottom { background: linear-gradient(135deg, #4dabf7 0%, #9147f1 50%, #e841a5 100%); color: #fff; text-align: center; padding: 76px 0; }
.lv-bottom h2 { font-size: clamp(28px, 3.4vw, 38px); font-weight: 800; margin-bottom: 12px; }
.lv-bottom p { color: rgba(255,255,255,.88); margin-bottom: 28px; }

/* Footer 同色系渐变（略深，形成层次） */
.lv-footer { background: linear-gradient(135deg, #9147f1 0%, #e841a5 100%); color: #c7d2fe; padding: 44px 0 28px; }
.lv-footer-top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 28px; padding-bottom: 24px; border-bottom: 1px solid rgba(255,255,255,.15); margin-bottom: 18px; }
.lv-footer-top p { max-width: 300px; font-size: 13px; margin-top: 10px; color: #c7d2fe; }
.lv-foot-col h4 { color: #fff; font-size: 14px; margin-bottom: 12px; }
.lv-foot-col li { font-size: 13px; margin-bottom: 8px; color: #c7d2fe; }
.lv-foot-col a:hover { color: #fff; }
.lv-foot-copy { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; font-size: 12.5px; color: #a5b4fc; }

@media (max-width: 900px) {
  .lv-hero-in { grid-template-columns: 1fr; }
  .lv-phone { margin-top: 20px; }
  .lv-countries { grid-template-columns: repeat(3, 1fr); }
  .lv-grid4, .lv-platforms, .lv-plans { grid-template-columns: 1fr 1fr; }
  .lv-nav { display: none; }
  .lv-sec { padding: 54px 0; }
}
@media (max-width: 560px) {
  .lv-countries { grid-template-columns: repeat(2, 1fr); }
  .lv-grid4, .lv-platforms, .lv-plans { grid-template-columns: 1fr; }
}