/* 首屏使用单一晶体视觉，产品内容从下一白色区直接开始。 */
.hero { position: relative; overflow-x: clip; overflow-y: visible; min-height: 810px; padding-top: 88px; background: var(--night); color: #fff; }
.hero__inner { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; width: min(calc(100% - 40px), 1380px); min-height: 710px; margin: 0 auto; }
.hero__copy { position: relative; z-index: 2; max-width: 680px; padding: 60px 0 84px; }
.hero h1 { margin: 0; font-size: clamp(52px, 5.3vw, 78px); line-height: 1.14; letter-spacing: -.05em; }
.hero__copy > p { margin: 28px 0 0; color: rgba(255, 255, 255, .7); font-size: 18px; line-height: 1.9; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 34px; }
.proof-list { display: flex; flex-wrap: wrap; gap: 0; margin: 42px 0 0; padding: 0; color: rgba(255, 255, 255, .7); font-size: 14px; list-style: none; }
.proof-list li { display: flex; align-items: center; gap: 10px; }
.proof-list li::before { width: 9px; height: 9px; border: 2px solid var(--mint); border-radius: 50%; content: ""; }
.proof-list li + li { margin-left: 22px; padding-left: 22px; border-left: 1px solid rgba(255, 255, 255, .24); }
.hero__art { position: relative; align-self: stretch; margin-right: -80px; }
.hero__art::after { position: absolute; inset: 0; background: linear-gradient(90deg, var(--night), transparent 25%); content: ""; pointer-events: none; }
.hero__art img { width: 100%; height: 100%; object-fit: cover; object-position: 60% center; }
.hero__transition { position: absolute; z-index: 3; right: 0; bottom: 0; left: 0; height: 3px; background: linear-gradient(90deg, var(--mint), #43cdd9 42%, #84a7ff 72%, var(--violet)); }

/* 服务保障以开放式承诺带呈现，避免与开通流程重复。 */
.guarantee { position: relative; overflow: clip; width: min(calc(100% - 40px), var(--container)); margin: 0 auto; padding: 96px 0 108px; scroll-margin-top: 24px; }
.guarantee::after { position: absolute; right: 0; bottom: 0; left: 0; height: 1px; background: linear-gradient(90deg, transparent 0, #dce3eb 8%, #dce3eb 43%, #66dcbc 48%, #5e8cf2 51%, #7c70ed 54%, #dce3eb 59%, #dce3eb 92%, transparent 100%); content: ""; }
.guarantee__header { position: relative; min-height: 286px; }
.guarantee__title { position: relative; z-index: 2; width: min(1040px, 82%); }
.section-label--bar { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; color: var(--ink); font-size: 15px; letter-spacing: .12em; }
.section-label--bar::before { width: 5px; height: 30px; flex: 0 0 auto; border-radius: 4px; background: linear-gradient(var(--mint), var(--blue) 68%, var(--violet)); content: ""; }
.guarantee__title h2 { margin: 0; font-size: clamp(48px, 4.2vw, 68px); line-height: 1.13; letter-spacing: -.05em; white-space: nowrap; }
.guarantee__title h2 > span { display: inline; }
.guarantee__title-accent { position: relative; background: linear-gradient(95deg, #55dcb9 2%, #4b9af6 55%, #6675f3 92%); background-clip: text; color: transparent; -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.guarantee__title-accent::after { position: absolute; right: -1%; bottom: -9px; left: 0; height: 2px; border-radius: 50%; background: linear-gradient(90deg, var(--mint), var(--blue) 58%, var(--violet)); content: ""; transform: rotate(-.7deg); transform-origin: left center; }
.guarantee__intro { max-width: 880px; margin: 32px 0 0; color: #445166; font-size: 16px; line-height: 1.85; }
.guarantee__signal { position: absolute; top: 82px; right: 4px; width: 27%; height: 138px; border-top: 1px solid #dce4ee; border-right: 1px solid #91a7fa; border-radius: 0 76px 0 0; }
.guarantee__signal span { position: absolute; width: 20px; height: 20px; background: var(--mint); clip-path: polygon(50% 0, 60% 40%, 100% 50%, 60% 60%, 50% 100%, 40% 60%, 0 50%, 40% 40%); }
.guarantee__signal span:first-child { top: -10px; right: 48%; }
.guarantee__signal span:last-child { right: -10px; bottom: 26px; background: var(--blue); }
.guarantee-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
.guarantee-list article { position: relative; min-width: 0; min-height: 286px; padding: 0 38px 8px; border-left: 1px solid var(--line); text-align: center; }
.guarantee-list article:first-child { border-left: 0; }
.guarantee-item__number { display: block; margin-bottom: 18px; color: #28cdb0; font-size: 20px; font-weight: 700; letter-spacing: -.03em; }
.guarantee-item__icon { display: inline-flex; width: 68px; height: 68px; align-items: center; justify-content: center; color: #28cdb0; transition: transform .2s ease; }
.guarantee-item__icon svg { width: 52px; height: 52px; }
.guarantee-list article:nth-child(2) .guarantee-item__icon { color: #4c9df4; }
.guarantee-list article:nth-child(3) .guarantee-item__icon { color: #6a75ef; }
.guarantee-list article:nth-child(4) .guarantee-item__icon { color: #8268e9; }
.guarantee-list article:nth-child(2) .guarantee-item__number { color: #328ff1; }
.guarantee-list article:nth-child(3) .guarantee-item__number { color: #6a75ef; }
.guarantee-list article:nth-child(4) .guarantee-item__number { color: #8268e9; }
.guarantee-list article:hover .guarantee-item__icon { transform: translateY(-4px); }
.guarantee-list h3 { margin: 13px 0 0; font-size: 24px; letter-spacing: -.025em; }
.guarantee-list p { max-width: 236px; margin: 18px auto 0; color: var(--muted); font-size: 15px; line-height: 1.8; }

/* 开通与退款延续官网白底光谱体系，只用轻色面板突出保障信息。 */
.activation { position: relative; background: var(--paper); color: var(--ink); }
.activation::after { position: absolute; bottom: 0; left: 50%; width: min(calc(100% - 40px), var(--container)); height: 1px; background: linear-gradient(90deg, transparent 0, #dce3eb 8%, #dce3eb 43%, #66dcbc 48%, #5e8cf2 51%, #7c70ed 54%, #dce3eb 59%, #dce3eb 92%, transparent 100%); content: ""; transform: translateX(-50%); }
.activation__inner { display: grid; grid-template-columns: 1.55fr .85fr; gap: 80px; width: min(calc(100% - 40px), var(--container)); margin: 0 auto; padding: 92px 0 96px; }
.activation h2 { margin: 0; font-size: clamp(44px, 4vw, 56px); line-height: 1.15; letter-spacing: -.045em; }
.step-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin: 88px 0 0; padding: 0; list-style: none; }
.step-list li { position: relative; min-width: 0; padding: 48px 18px 0 0; border-top: 1px solid #ced7e3; }
.step-list li > span { position: absolute; top: -30px; left: 0; display: grid; width: 60px; height: 60px; place-items: center; border: 1.5px solid #52d7b8; border-radius: 50%; background: #fff; color: #42cdb0; font-size: 18px; font-weight: 800; box-shadow: 0 0 0 8px #fff; }
.step-list li:nth-child(2) > span { border-color: #4c9df4; color: #3989ec; }
.step-list li:nth-child(3) > span { border-color: #8268e9; color: #7259df; }
.step-list h3 { margin: 0; font-size: 20px; letter-spacing: -.02em; }
.step-list p { max-width: 230px; margin: 16px 0 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.refund-summary { align-self: start; border: 1px solid #cbd5ff; border-radius: 18px; padding: 42px; background: linear-gradient(145deg, #f9fbff, #f6f5ff); box-shadow: 0 20px 50px rgba(73, 101, 173, .07); }
.refund-summary__icon { display: grid; width: 62px; height: 62px; margin: 0 0 22px; place-items: center; border: 1px solid #d5def0; border-radius: 50%; background: rgba(255, 255, 255, .72); color: #526feb; }
.refund-summary__icon svg { width: 34px; height: 34px; }
.refund-summary h2 { margin: 0; padding-bottom: 28px; border-bottom: 1px solid #d7deea; font-size: 28px; letter-spacing: -.025em; }
.refund-summary > p:not(.refund-summary__icon) { position: relative; margin: 24px 0 0; padding-left: 19px; color: #4e5c71; font-size: 14px; line-height: 1.8; }
.refund-summary > p:not(.refund-summary__icon)::before { position: absolute; top: .72em; left: 0; width: 7px; height: 7px; border-radius: 50%; background: #5e7ef5; content: ""; }
.refund-summary strong { color: var(--ink); }
.refund-summary a { display: inline-block; margin-top: 30px; color: #4d6ff4; font-size: 14px; font-weight: 700; }

/* FAQ 原生 details 在收起时仍保留完整服务器 HTML。 */
.faq { display: grid; grid-template-columns: .68fr 1.32fr; gap: 80px; width: min(calc(100% - 40px), var(--container)); margin: 0 auto; padding: 112px 0; }
.faq__heading h2 { margin: 0; font-size: clamp(38px, 4vw, 54px); line-height: 1.22; letter-spacing: -.04em; }
.faq__heading > p:last-child { max-width: 360px; margin: 24px 0 0; color: var(--muted); line-height: 1.8; }
.faq__list { border-top: 1px solid #ccd5df; }
.faq__list details { border-bottom: 1px solid #ccd5df; }
.faq__list summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 78px; cursor: pointer; font-size: 17px; font-weight: 700; list-style: none; }
.faq__list summary::-webkit-details-marker { display: none; }
.faq__list summary span { color: #5e7ef5; font-size: 24px; font-weight: 400; transition: transform .18s; }
.faq__list details[open] summary span { transform: rotate(45deg); }
.faq__list details p { max-width: 760px; margin: -4px 0 26px; color: var(--muted); line-height: 1.9; }

/* 悬浮客服延续极光配色，二维码卡片仅在交互时展开，避免遮挡首页内容。 */
.customer-service { position: fixed; z-index: 40; right: clamp(8px, calc(2.2vw - 10px), 24px); bottom: clamp(24px, 4vh, 42px); }
.customer-service__toggle { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; opacity: 0; }
.customer-service__trigger { position: relative; display: grid; width: 70px; min-height: 74px; place-items: center; align-content: center; gap: 6px; overflow: hidden; border: 1px solid rgba(151, 180, 218, .28); border-radius: 16px; background: rgba(6, 17, 31, .94); color: #fff; cursor: pointer; box-shadow: 0 14px 32px rgba(6, 17, 31, .22), inset 0 1px rgba(255, 255, 255, .08); backdrop-filter: blur(14px); transition: border-color .2s ease, box-shadow .2s ease; }
.customer-service__trigger::after { position: absolute; top: 0; right: 9px; left: 9px; height: 2px; border-radius: 0 0 2px 2px; background: linear-gradient(90deg, var(--mint), #62a6f6, var(--violet)); content: ""; }
.customer-service__trigger svg { width: 25px; height: 25px; color: var(--mint); }
.customer-service__trigger > span:last-child { font-size: 11px; font-weight: 700; letter-spacing: .04em; }
.customer-service__status { position: absolute; top: 9px; right: 9px; width: 7px; height: 7px; border: 1.5px solid var(--night); border-radius: 50%; background: var(--mint); box-shadow: 0 0 0 3px rgba(103, 228, 193, .14); }
.customer-service__panel { position: absolute; right: calc(100% + 14px); bottom: 0; width: 258px; padding: 18px; border: 1px solid rgba(17, 42, 72, .12); border-radius: 20px; background: rgba(255, 255, 255, .98); color: var(--ink); box-shadow: 0 24px 64px rgba(6, 17, 31, .2); opacity: 0; visibility: hidden; pointer-events: none; transform: translateX(10px) scale(.98); transform-origin: right bottom; transition: opacity .18s ease, visibility .18s ease, transform .18s ease; }
.customer-service__panel::after { position: absolute; right: -15px; bottom: 0; width: 15px; height: 74px; content: ""; }
.customer-service__heading { display: flex; align-items: flex-start; gap: 10px; }
.customer-service__heading > span { width: 8px; height: 8px; flex: 0 0 auto; margin-top: 5px; border-radius: 50%; background: #11b86a; box-shadow: 0 0 0 4px rgba(17, 184, 106, .11); }
.customer-service__heading strong { display: block; font-size: 16px; letter-spacing: -.01em; }
.customer-service__heading p { margin: 5px 0 0; color: var(--muted); font-size: 12px; }
.customer-service__panel img { width: 100%; height: auto; margin-top: 13px; border-radius: 12px; background: #fff; }
.customer-service__tip { margin: 4px 0 0; color: var(--muted); font-size: 12px; text-align: center; }
.customer-service:hover .customer-service__trigger, .customer-service__toggle:checked + .customer-service__trigger { border-color: rgba(103, 228, 193, .58); box-shadow: 0 16px 38px rgba(6, 17, 31, .27), 0 0 0 4px rgba(103, 228, 193, .08); }
.customer-service:hover .customer-service__panel, .customer-service__toggle:focus ~ .customer-service__panel, .customer-service__toggle:checked ~ .customer-service__panel { opacity: 1; visibility: visible; pointer-events: auto; transform: translateX(0) scale(1); }
.customer-service__toggle:focus-visible + .customer-service__trigger { outline: 3px solid rgba(103, 228, 193, .55); outline-offset: 3px; }

@media (max-width: 900px) {
  .hero { min-height: auto; }
  .hero__inner { grid-template-columns: 1fr; width: min(calc(100% - 40px), 1380px); }
  .hero__copy { padding: 82px 0 32px; }
  .hero__art { height: 420px; margin: -40px -110px 0 10%; }
  .proof-list { margin-top: 34px; }
  .guarantee__header { min-height: auto; }
  .guarantee__title { width: 100%; }
  .guarantee__title h2 { font-size: clamp(46px, 7vw, 58px); line-height: 1.1; white-space: normal; }
  .guarantee__title h2 > span { display: block; width: max-content; max-width: 100%; }
  .guarantee__signal { display: none; }
  .guarantee-list { grid-template-columns: repeat(2, minmax(0, 1fr)); margin-top: 58px; border-top: 1px solid var(--line); }
  .guarantee-list article { min-height: 280px; padding: 34px; text-align: left; }
  .guarantee-list article:nth-child(n+3) { border-top: 1px solid var(--line); }
  .guarantee-list article:nth-child(2n) { border-right: 1px solid var(--line); }
  .guarantee-list article:first-child { border-left: 1px solid var(--line); }
  .guarantee-item__number { position: absolute; top: 28px; right: 28px; margin: 0; font-size: 24px; }
  .guarantee-list p { margin-left: 0; }
  .activation__inner, .faq { grid-template-columns: 1fr; gap: 44px; }
  .refund-summary { max-width: 620px; }
}

@media (max-width: 620px) {
  .hero { padding-top: 80px; }
  .hero__inner { width: min(calc(100% - 32px), 1380px); }
  .hero__copy { padding-top: 58px; }
  .hero h1 { font-size: 44px; }
  .hero__copy > p { font-size: 16px; }
  .hero__actions .button { flex: 1 1 150px; padding-inline: 16px; }
  .proof-list { gap: 12px 0; }
  .proof-list li + li { margin-left: 0; padding-left: 0; border: 0; }
  .proof-list li { width: 50%; }
  .hero__art { height: 330px; margin: -20px -120px 0 -10px; }
  .guarantee, .activation__inner, .faq { width: min(calc(100% - 32px), var(--container)); }
  .activation::after { width: min(calc(100% - 32px), var(--container)); }
  .guarantee { padding-block: 80px 72px; }
  .activation__inner, .faq { padding-block: 80px; }
  .section-label--bar { font-size: 14px; }
  .section-label--bar::before { width: 5px; height: 28px; }
  .guarantee__title h2 { font-size: 38px; line-height: 1.12; }
  .guarantee__title-accent::after { bottom: -6px; height: 2px; }
  .guarantee__intro { margin-top: 26px; font-size: 15px; }
  .guarantee-list { display: block; margin-top: 40px; border-top: 1px solid var(--line); }
  .guarantee-list article { display: grid; grid-template-columns: 50px minmax(0, 1fr); align-items: start; gap: 0 14px; min-height: 0; padding: 30px 0; border-top: 0; border-right: 0 !important; border-bottom: 1px solid var(--line); border-left: 0 !important; text-align: left; }
  .guarantee-list article:last-child { border-bottom: 1px solid var(--line); }
  .guarantee-item__number { position: static; grid-column: 1; margin: 1px 0 12px; font-size: 15px; }
  .guarantee-item__icon { grid-column: 1; grid-row: 2 / span 2; width: 46px; height: 46px; }
  .guarantee-item__icon svg { width: 38px; height: 38px; }
  .guarantee-list h3 { margin-top: 1px; }
  .guarantee-list p { grid-column: 2; margin-top: 11px; }
  .step-list { position: relative; grid-template-columns: 1fr; gap: 40px; margin-top: 52px; padding-left: 56px; }
  .step-list::before { position: absolute; top: 20px; bottom: 20px; left: 19px; width: 1px; background: linear-gradient(var(--mint), var(--blue) 54%, var(--violet)); content: ""; }
  .step-list li { padding: 0; border-top: 0; }
  .step-list li > span { top: 0; left: -56px; width: 40px; height: 40px; border-width: 1px; font-size: 13px; box-shadow: 0 0 0 6px #fff; }
  .step-list p { max-width: none; margin-top: 10px; }
  .refund-summary { padding: 28px; }
  .customer-service { right: calc(6px + env(safe-area-inset-right)); bottom: calc(18px + env(safe-area-inset-bottom)); }
  .customer-service__trigger { width: 66px; min-height: 68px; border-radius: 15px; }
  .customer-service__panel { right: 0; bottom: calc(100% + 12px); width: min(258px, calc(100vw - 32px)); transform: translateY(10px) scale(.98); transform-origin: right bottom; }
  .customer-service__panel::after { right: 0; bottom: -13px; width: 68px; height: 13px; }
  .customer-service:hover .customer-service__panel, .customer-service__toggle:focus ~ .customer-service__panel, .customer-service__toggle:checked ~ .customer-service__panel { transform: translateY(0) scale(1); }
}