:root {
  --green: #07b75b;
  --green-ink: #087e43;
  --green-button: #078747;
  --green-soft: #eff9f2;
  --ink: #1d2421;
  --muted: #6b746f;
  --line: #e8ece9;
  --paper: #f7f9f7;
  --radius: 14px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 100px; }
body { margin: 0; color: var(--ink); background: #fff; font-family: var(--font); font-size: 15px; line-height: 1.7; -webkit-font-smoothing: antialiased; }
body:has(dialog[open]) { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; }
button:disabled { cursor: wait; }
button { color: inherit; }
button, input { font-family: var(--font); }
button:focus-visible, a:focus-visible, summary:focus-visible, [tabindex]:focus-visible { outline: 3px solid #1a9358; outline-offset: 5px; }
button::-moz-focus-inner { border: 0; }
::selection { color: #063c22; background: #c9efd6; }
[hidden] { display: none !important; }
.symbol-library { position: absolute; width: 0; height: 0; overflow: hidden; }
.container { width: min(1180px, calc(100% - 80px)); margin-inline: auto; }
.icon { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; vertical-align: middle; }
.skip-link { position: fixed; left: 20px; top: -80px; padding: 10px 18px; background: var(--ink); color: white; z-index: 100; border-radius: 5px; }
.skip-link:focus { top: 12px; }
.site-header { height: 80px; position: sticky; top: 0; z-index: 20; background: rgb(255 255 255 / 94%); border-bottom: 1px solid #edf0ed; backdrop-filter: blur(18px); }
.header-inner { display: flex; height: 100%; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-name { display: flex; align-items: baseline; gap: 10px; font-weight: 650; font-size: 22px; letter-spacing: .3px; }
.brand-name > span { color: #737e76; font-size: 14px; font-weight: 450; letter-spacing: -.2px; }
.desktop-nav { display: flex; gap: 32px; margin-left: auto; margin-right: 28px; font-size: 14px; color: #58635c; }
.desktop-nav a, .footer-inner a { transition: color .15s ease; }
.desktop-nav a:hover, .footer-inner a:hover { color: var(--green-ink); }
.header-download { display: flex; align-items: center; justify-content: center; gap: 11px; font-size: 13px; font-weight: 550; background: #f1f5f2; border: 1px solid #e9eeea; padding: 8px 16px; border-radius: 8px; transition: background .15s; }
.header-download .icon { width: 16px; height: 16px; }
.header-download:hover { background: #e9f5ed; }
.menu-toggle { display: none; }
.mobile-nav { background: white; border-bottom: 1px solid var(--line); padding: 12px 24px 20px; box-shadow: 0 12px 20px #122e1810; }
.mobile-nav a { display: block; padding: 10px 0; color: #45554a; }

.hero { position: relative; overflow: hidden; background: radial-gradient(ellipse at 83% 39%, #edf9ef 0, #f9fcf9 32%, #fff 66%); }
.hero-layout { display: grid; grid-template-columns: minmax(0, 1.04fr) minmax(0, 1fr); align-items: center; gap: 55px; padding-top: 91px; padding-bottom: 84px; }
.hero-copy { min-width: 0; }
.eyebrow { margin: 0 0 14px; color: var(--green-ink); font-weight: 550; font-size: 12px; letter-spacing: 1.2px; }
.hero-eyebrow { display: flex; gap: 9px; align-items: center; font-size: 13px; letter-spacing: .8px; margin-bottom: 22px; }
.tiny-bridge { width: 18px; height: 13px; border: 1.5px solid #438e60; border-bottom: 0; border-radius: 10px 10px 0 0; position: relative; }
.tiny-bridge::after { content: ""; position: absolute; left: -3px; right: -3px; bottom: 3px; border-top: 1.5px solid #438e60; }
h1, h2, h3, p { overflow-wrap: break-word; }
h1 { margin: 0; font-size: clamp(44px, 4.5vw, 62px); line-height: 1.32; letter-spacing: -2.2px; font-weight: 650; }
h1 > span { color: #079a4e; }
.hero-description { font-size: 17px; line-height: 1.95; color: #657169; margin: 25px 0 29px; letter-spacing: .15px; }
.hero-actions { display: flex; align-items: center; gap: 13px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 48px; padding: 11px 22px; border-radius: 8px; border: 1px solid transparent; font-size: 14px; font-weight: 550; line-height: 1.7; transition: background .15s, border-color .15s, transform .15s; }
.button:hover { transform: translateY(-1px); }
.button-primary { background: var(--green-button); color: white; box-shadow: 0 3px 6px #056e2910; }
.button-primary:hover { background: #06763f; }
.button-primary .icon { width: 18px; height: 18px; }
.button-secondary { background: white; border-color: #dfe7e1; color: #3f4c44; gap: 10px; }
.button-secondary:hover { background: #f6faf7; border-color: #b3cdbb; }
.button-secondary .icon { width: 18px; height: 18px; color: #6b7c6e; }
.hero-caption { color: #7d867f; font-size: 12px; margin: 16px 0 26px; }
.protocol-tags { display: flex; align-items: center; gap: 11px; font-family: "Segoe UI", var(--font); font-size: 11px; color: #758179; letter-spacing: .1px; }
.protocol-tags > span { padding: 2px 10px; border: 1px solid #e4ebe5; border-radius: 5px; background: #ffffffa0; }
.bridge-visual { position: relative; padding: 8px 3px 8px 13px; }
.visual-orbit { position: absolute; border: 1px solid #ddeee0; border-radius: 50%; pointer-events: none; }
.orbit-one { height: 510px; width: 510px; top: -42px; left: -10px; }
.orbit-two { height: 600px; width: 600px; top: -86px; left: -55px; border-style: dashed; opacity: .65; }
.flow-card { position: relative; border: 1px solid #e3ebe3; border-radius: 17px; background: #ffffffeb; box-shadow: 0 18px 55px -22px #30513730, 0 2px 8px #233e2704; overflow: hidden; transform: rotate(-1deg); }
.flow-heading { display: flex; justify-content: space-between; align-items: center; padding: 19px 23px; border-bottom: 1px solid #edf1ed; gap: 12px; font-size: 12px; }
.flow-heading > span:first-child { display: flex; align-items: center; gap: 8px; color: #65766b; }
.flow-dot { width: 6px; height: 6px; background: #80ae8b; border-radius: 50%; }
.diagram-label { font-size: 10px; padding: 1px 8px; border: 1px solid #e5ebe6; border-radius: 4px; color: #809087; }
.flow-nodes { display: flex; justify-content: space-between; align-items: center; gap: 0; padding: 30px 29px 13px; }
.flow-node { display: flex; flex-direction: column; align-items: center; width: 94px; flex-shrink: 0; }
.flow-node strong { margin-top: 13px; font-size: 13px; font-weight: 550; }
.flow-node > span { font-size: 10px; color: #8b938e; margin-top: 1px; }
.wechat-symbol, .server-symbol { width: 53px; height: 53px; border-radius: 15px; display: grid; place-items: center; }
.wechat-symbol { background: #08b75c; }
.wechat-symbol svg { width: 42px; height: 42px; }
.server-symbol { background: #edf2ee; border: 1px solid #e2e9e3; color: #4e6c58; }
.server-symbol .icon { height: 28px; width: 28px; stroke-width: 1.4; }
.bridge-node > img { box-shadow: 0 0 0 7px #f1faf3; width: 57px; height: 57px; }
.connection-line { display: flex; align-items: center; flex: 1; padding: 0 5px; margin-top: -47px; color: #8cbe9b; min-width: 20px; }
.connection-line > span { flex: 1; border-top: 1px dashed #b4d4bc; }
.connection-line .icon { width: 11px; height: 11px; margin-left: -4px; }
.flow-directions { display: flex; align-items: center; justify-content: center; gap: 26px; font-size: 10px; color: #8a948c; margin: 4px 0 22px; }
.flow-directions > span { display: inline-flex; align-items: center; gap: 6px; }
.direction-dot { width: 5px; height: 5px; background: #61ab77; border-radius: 50%; }
.secondary-dot { background: #93a7b9; }
.example-card { margin: 0 22px 19px; border: 1px solid #e8ede8; border-radius: 9px; background: #f8faf8; }
.example-heading { display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid #e9eeea; padding: 9px 14px; color: #869289; font-size: 10px; }
.example-heading > span:first-child { display: inline-flex; align-items: center; gap: 7px; font-family: Consolas, monospace; color: #4c6553; font-size: 11px; }
.code-dot { width: 5px; height: 5px; border-radius: 50%; background: #5eac75; }
.example-card pre { font-family: Consolas, "SFMono-Regular", monospace; font-size: 12px; line-height: 1.85; margin: 12px 16px 14px; white-space: pre-wrap; }
.syntax-key { color: #5d6d62; }
.syntax-string { color: #1f9155; }
.syntax-brace { color: #a2aaa4; }
.flow-footer { display: flex; align-items: center; justify-content: center; gap: 7px; margin: 0 0 16px; color: #8a988d; font-size: 10px; letter-spacing: .2px; }
.flow-footer .icon { width: 13px; height: 13px; }
.floating-note { position: absolute; bottom: 47px; right: -26px; display: flex; align-items: center; gap: 9px; padding: 11px 16px 11px 11px; border: 1px solid #e0eae1; border-radius: 10px; background: #fff; box-shadow: 0 8px 26px -6px #2b503522; transform: rotate(2deg); font-size: 10px; line-height: 1.75; color: #87918a; }
.floating-note strong { font-size: 11px; font-weight: 550; color: #45614b; }
.note-icon { display: grid; place-items: center; height: 30px; width: 30px; background: #eff9f1; border-radius: 8px; color: #56966b; }
.note-icon .icon { width: 17px; height: 17px; }
.hero-facts { display: grid; grid-template-columns: repeat(3, 1fr); padding-top: 23px; padding-bottom: 23px; border-top: 1px solid var(--line); font-size: 12px; color: #738077; }
.hero-facts > div { display: flex; justify-content: center; align-items: center; gap: 10px; }
.hero-facts > div + div { border-left: 1px solid var(--line); }
.hero-facts .icon { width: 17px; height: 17px; color: #71917b; }

.section { padding: 88px 0; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 25px; margin-bottom: 39px; }
h2 { margin: 0; font-size: 31px; font-weight: 600; letter-spacing: -.8px; line-height: 1.5; }
h3 { font-size: 17px; font-weight: 550; margin: 0; line-height: 1.6; }
.section-description { margin: 11px 0 0; font-size: 14px; color: #7b847e; }
.text-link { display: inline-flex; align-items: center; gap: 9px; font-size: 12px; color: var(--green-ink); font-weight: 550; border: 0; background: none; padding: 0; }
.text-link .icon { width: 16px; height: 16px; transition: transform .15s; }
.text-link:hover .icon { transform: translateX(3px); }
.section-heading > .text-link { padding-bottom: 7px; white-space: nowrap; }
.start-section { padding-top: 80px; padding-bottom: 84px; }
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 35px; }
.step-top { display: flex; align-items: center; gap: 17px; margin-bottom: 22px; }
.step-number { display: inline-grid; place-items: center; width: 32px; height: 32px; background: #f0f7f1; border: 1px solid #e4ede5; border-radius: 8px; color: #528665; font-size: 12px; font-family: "Segoe UI", var(--font); font-weight: 550; }
.step-line { flex: 1; border-top: 1px dashed #dce6de; }
.step h3 { font-size: 16px; }
.step > p { margin: 11px 0 16px; color: #778179; font-size: 13px; min-height: 66px; line-height: 1.9; }
.step .text-link { font-size: 11px; }

.connect-section { background: #f7f9f7; border-top: 1px solid #edf1ed; border-bottom: 1px solid #edf1ed; }
.edition-label { color: #88938b; font-size: 11px; padding-bottom: 3px; }
.connection-tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 17px; }
.connection-tab { padding: 23px 25px 21px; border: 1px solid #e1e8e2; background: #fff; border-radius: 11px; text-align: left; min-width: 0; transition: border-color .15s, box-shadow .15s, background .15s; }
.connection-tab:hover { border-color: #a7c9b1; }
.connection-tab.active { border-color: #63b97e; background: #f8fff9; box-shadow: 0 0 0 1px #83c89520; }
.tab-top { display: flex; align-items: center; gap: 10px; margin-bottom: 21px; }
.mode-icon { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 8px; background: #f0f4f1; color: #71937d; }
.mode-icon .icon { width: 17px; height: 17px; }
.tab-type { font-size: 10px; color: #8a958e; }
.tab-check { margin-left: auto; opacity: 0; border: 1px solid #b4d8bf; border-radius: 50%; width: 17px; height: 17px; padding: 2px; color: #319555; background: #ebf8ee; }
.active .tab-check { opacity: 1; }
.connection-tab > strong { display: block; font-size: 20px; letter-spacing: -.5px; line-height: 1.5; font-weight: 600; }
.connection-tab > span:last-child { display: block; font-size: 12px; color: #7b857d; margin-top: 8px; }
.connection-panel { display: flex; justify-content: space-between; gap: 35px; padding: 30px 32px; background: #fff; border: 1px solid #e1e8e2; border-radius: 11px; margin-top: 19px; min-height: 192px; }
.connection-panel > div:first-child { max-width: 690px; }
.panel-label { font-size: 10px; color: var(--green-ink); background: #eff8f0; padding: 3px 9px; border-radius: 4px; }
.connection-panel h3 { font-size: 15px; margin-top: 10px; }
.connection-panel p { font-size: 12px; color: #748077; margin: 8px 0 0; line-height: 1.9; }
.connection-panel .panel-note { font-size: 10px; color: #8a948c; }
.connection-panel code { font-family: Consolas, "SFMono-Regular", monospace; font-size: .95em; }
.panel-action { display: flex; flex-direction: column; justify-content: center; align-items: flex-end; gap: 16px; min-width: 235px; }
.panel-action > code { display: block; background: #f7f9f7; border: 1px solid #edf0ed; border-radius: 5px; padding: 9px 13px; color: #627a69; font-size: 11px; max-width: 100%; overflow-wrap: anywhere; }
.connection-footnote { font-size: 10px; color: #8b948e; margin: 16px 0 0; }

.docs-section { padding-bottom: 80px; }
.docs-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 21px; }
.doc-card { border: 1px solid var(--line); border-radius: 12px; padding: 25px 25px 0; background: #fff; transition: border-color .15s, box-shadow .15s; }
.doc-card:hover { border-color: #c8d9cc; box-shadow: 0 8px 25px #224e2a06; }
.doc-card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 22px; }
.doc-icon { width: 36px; height: 36px; display: grid; place-items: center; color: #4c825e; background: #f0f6f1; border-radius: 9px; }
.doc-icon .icon { width: 19px; height: 19px; }
.doc-badge { font-family: Consolas, monospace; font-size: 10px; color: #8a948d; padding: 2px 7px; border-radius: 4px; background: #f6f8f6; border: 1px solid #edf0ed; }
.doc-card h3 { font-size: 18px; }
.doc-card > p { color: #7a857d; font-size: 12px; line-height: 1.9; margin: 11px 0 20px; min-height: 46px; }
.doc-card > .text-link { margin-bottom: 25px; }
.doc-card-footer { border-top: 1px solid #edf0ed; display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 15px 0; }
.doc-card-footer a, .doc-card-footer button { display: inline-flex; align-items: center; gap: 6px; font-size: 10px; color: #748278; border: 0; background: none; padding: 0; }
.doc-card-footer .icon { width: 13px; height: 13px; }
.doc-card-footer a:hover, .doc-card-footer button:hover { color: var(--green-ink); }
.ai-note { display: flex; align-items: center; gap: 16px; padding: 22px 24px; border: 1px solid #e5ede6; background: #f8fbf8; border-radius: 9px; margin-top: 23px; }
.ai-note-icon { color: #7b9a83; display: grid; place-items: center; }
.ai-note p { color: #7c897f; font-size: 11px; margin: 0; line-height: 1.9; flex: 1; }
.ai-note p strong { color: #4c6555; font-weight: 550; }
.ai-note > a { white-space: nowrap; font-size: 11px; margin-left: 8px; }

.resources-section { padding-top: 78px; padding-bottom: 78px; border-block: 1px solid #edf1ed; background: #f8faf8; }
.resource-layout { display: grid; grid-template-columns: 1fr 1.25fr; gap: 100px; align-items: center; }
.resource-copy > p:not(.eyebrow) { color: #7b857e; font-size: 12px; line-height: 2; margin: 17px 0 21px; }
.resource-list { display: flex; flex-direction: column; gap: 14px; }
.resource-item { display: flex; align-items: center; gap: 17px; padding: 23px 25px; background: #fff; border: 1px solid #e4ebe5; border-radius: 11px; }
a.resource-item:hover { border-color: #9dcaaa; }
.resource-icon { height: 43px; width: 43px; background: #f0f6f1; color: #679674; border-radius: 10px; display: grid; place-items: center; flex-shrink: 0; }
.resource-item > span:nth-child(2) { flex: 1; min-width: 0; }
.resource-item strong { font-size: 13px; font-weight: 550; display: flex; align-items: center; gap: 9px; flex-wrap: wrap; }
.resource-description { display: block; color: #8a938d; font-size: 10px; margin-top: 6px; line-height: 1.8; }
.small-tag, .neutral-tag { display: inline-block; font-size: 9px; border-radius: 4px; padding: 1px 6px; font-weight: 400; white-space: nowrap; }
.small-tag { color: #4e8b5f; background: #edf7ef; }
.neutral-tag { color: #859088; background: #f0f3f0; }
.resource-arrow { color: #70a47f; height: 17px; width: 17px; }
.unavailable .resource-icon { background: #f3f5f3; color: #95a098; }
.resource-disclaimer { font-size: 10px; color: #919b94; margin: 0 3px; }

.pricing-currency { font-size: 10px; color: #8c958f; padding-bottom: 3px; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.price-card { border: 1px solid var(--line); border-radius: 11px; padding: 27px; }
.plan-name { font-size: 13px; color: #627066; font-weight: 500; }
.price { font-family: "Segoe UI", var(--font); margin: 16px 0 4px; font-size: 46px; letter-spacing: -1.5px; line-height: 1.5; font-weight: 550; }
.price > span { font-size: 21px; margin-right: 5px; font-weight: 400; vertical-align: 5px; }
.price > small { font-size: 11px; color: #939a96; margin-left: 7px; letter-spacing: 0; font-weight: 400; }
.plan-caption { font-size: 11px; color: #7f8a82; margin: 0 0 26px; }
.button-price { background: #f3f8f4; border-color: #e6eee8; color: var(--green-ink); font-size: 12px; min-height: 42px; padding: 8px 16px; justify-content: space-between; width: 100%; font-weight: 450; }
.button-price .icon { width: 16px; height: 16px; }
.button-price:hover { background: #eaf4ed; border-color: #c8dfce; }
.authorization-guide { margin-top: 23px; display: flex; align-items: flex-start; gap: 15px; background: #f8faf8; padding: 23px 26px; border-radius: 9px; border: 1px solid #ecf0ec; scroll-margin-top: 115px; }
.authorization-icon { color: #6e9479; padding-top: 3px; }
.authorization-icon .icon { width: 21px; height: 21px; }
.authorization-guide h3 { font-size: 13px; }
.authorization-guide p { margin: 8px 0 4px; font-size: 11px; color: #758078; line-height: 1.9; }
.authorization-contact { font-size: 10px; color: #929b94; }
.authorization-guide:target { border-color: #8dc99d; }

.faq-section { padding-top: 0; padding-bottom: 86px; }
.faq-layout { display: grid; grid-template-columns: 1fr 1.65fr; gap: 90px; padding-top: 50px; border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list details:first-child { margin-top: -15px; }
.faq-list summary { font-size: 13px; font-weight: 500; padding: 20px 0; display: flex; align-items: center; justify-content: space-between; gap: 20px; cursor: pointer; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary > span { color: #92a497; font-size: 20px; font-weight: 300; transition: transform .15s; }
.faq-list details[open] summary > span { transform: rotate(45deg); }
.faq-list details > p { margin: -3px 28px 21px 0; font-size: 12px; color: #7a857e; line-height: 1.95; }
.faq-list details a { color: var(--green-ink); text-decoration: underline; text-underline-offset: 3px; }
.closing-section { background: #f0f7f1; border-block: 1px solid #e7efe8; padding: 49px 0; }
.closing-inner { display: flex; align-items: center; justify-content: space-between; gap: 25px; }
.closing-inner .eyebrow { margin-bottom: 9px; font-size: 10px; }
.closing-inner h2 { font-size: 26px; }
.closing-inner .button { font-size: 12px; min-height: 44px; }
.site-footer { padding: 30px 0; }
.footer-inner { display: flex; align-items: center; gap: 24px; font-size: 10px; color: #8a958e; }
.footer-brand { font-size: 13px; color: #65746a; font-weight: 550; }
.footer-inner > div { margin-left: auto; display: flex; gap: 25px; }
.footer-inner > span { border-left: 1px solid #e5ebe6; padding-left: 24px; }

.install-dialog { width: min(560px, calc(100% - 32px)); max-height: calc(100dvh - 48px); overflow-y: auto; padding: 30px; border: 1px solid #d9e7dc; border-radius: 17px; color: var(--ink); box-shadow: 0 24px 100px #052e1640; }
.install-dialog::backdrop { background: #15291da0; backdrop-filter: blur(4px); }
.dialog-heading { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.dialog-heading .eyebrow { margin: 0; }
.dialog-close { border: 0; border-radius: 50%; height: 30px; width: 30px; display: grid; place-items: center; background: #f1f5f2; font-size: 24px; color: #7f8d82; line-height: 1; }
.install-dialog h2 { font-size: 23px; }
.dialog-intro { font-size: 12px; color: #7a877e; margin-bottom: 25px; }
.install-method { display: flex; align-items: flex-start; gap: 15px; margin: 22px 0; }
.install-method > span { color: #5c9c70; background: #eff7f1; border-radius: 6px; padding: 3px 6px; font-size: 11px; }
.install-method h3 { font-size: 14px; }
.install-method p { font-size: 12px; color: #6f7d73; margin: 7px 0 0; line-height: 1.9; }
.dialog-footer { border-top: 1px solid #e6eee8; padding-top: 17px; color: #8d978f; font-size: 10px; }
.dialog-confirm { margin-top: 8px; width: 100%; min-height: 43px; font-size: 13px; }
.toast { position: fixed; left: 50%; bottom: 30px; transform: translateX(-50%); z-index: 50; background: #263b2f; color: white; border: 1px solid #ffffff20; box-shadow: 0 4px 30px #1c392f30; border-radius: 9px; padding: 12px 22px; font-size: 12px; max-width: calc(100% - 32px); width: max-content; text-align: center; }

@media (min-width: 1440px) {
  .hero-layout { padding-top: 102px; padding-bottom: 100px; }
}
@media (max-width: 1150px) {
  .container { width: calc(100% - 64px); }
  .hero-layout { gap: 24px; }
  h1 { font-size: 49px; }
  .desktop-nav { gap: 22px; margin-right: 12px; }
  .hero-description { font-size: 15px; }
  .flow-nodes { padding-inline: 18px; }
  .flow-node { width: 80px; }
  .floating-note { right: -13px; }
  .resource-layout { gap: 60px; }
  .doc-card { padding: 22px 20px 0; }
  .step > p { min-height: 74px; }
  .panel-action { min-width: 190px; }
  .connection-panel { padding: 25px; gap: 25px; }
}
@media (max-width: 900px) {
  .container { width: calc(100% - 48px); }
  .desktop-nav { gap: 20px; font-size: 12px; margin-right: 0; }
  .brand-name { font-size: 20px; gap: 7px; }
  .brand-name > span { display: none; }
  .header-download { font-size: 12px; padding-inline: 12px; }
  .hero-layout { gap: 28px; padding-top: 70px; padding-bottom: 64px; }
  h1 { font-size: 42px; letter-spacing: -1.5px; }
  .hero-description { font-size: 14px; }
  .hero-actions { flex-wrap: wrap; gap: 10px; }
  .hero-actions .button { font-size: 12px; min-height: 43px; padding: 9px 15px; gap: 10px; }
  .hero-caption { font-size: 10px; }
  .bridge-visual { padding-left: 0; }
  .flow-heading { padding: 16px; font-size: 10px; }
  .diagram-label { font-size: 8px; }
  .flow-nodes { padding: 27px 12px 12px; }
  .flow-node { width: 72px; }
  .flow-node strong { font-size: 12px; }
  .flow-node > span { font-size: 9px; }
  .wechat-symbol, .server-symbol { width: 45px; height: 45px; border-radius: 12px; }
  .wechat-symbol svg { width: 36px; height: 36px; }
  .bridge-node > img { width: 49px; height: 49px; }
  .example-card { margin-inline: 15px; }
  .example-card pre { font-size: 10px; margin-inline: 13px; }
  .floating-note { right: -10px; bottom: 33px; padding: 8px 11px; font-size: 8px; }
  .floating-note strong { font-size: 10px; }
  .hero-facts { font-size: 10px; }
  .hero-facts .icon { width: 15px; height: 15px; }
  .section { padding-block: 65px; }
  h2 { font-size: 26px; }
  .section-heading { gap: 15px; }
  .edition-label { font-size: 9px; }
  .steps { gap: 22px; }
  .step h3 { font-size: 14px; }
  .step > p { font-size: 11px; }
  .step .text-link { font-size: 10px; }
  .connection-tab { padding: 20px; }
  .connection-tab > strong { font-size: 18px; }
  .connection-tab > span:last-child { font-size: 10px; }
  .connection-tabs { gap: 12px; }
  .tab-type { font-size: 8px; }
  .connection-panel p { font-size: 11px; }
  .connection-panel .panel-note { font-size: 9px; }
  .panel-action { min-width: 170px; }
  .panel-action > code { font-size: 9px; }
  .docs-grid { gap: 13px; }
  .doc-card { padding: 20px 17px 0; }
  .doc-card h3 { font-size: 15px; }
  .doc-card > p { font-size: 11px; }
  .doc-card-footer { gap: 10px; flex-wrap: wrap; }
  .doc-card-footer a, .doc-card-footer button { font-size: 9px; }
  .ai-note { padding: 18px; gap: 12px; }
  .ai-note p { font-size: 10px; }
  .resource-layout { gap: 35px; }
  .resource-item { padding: 20px; gap: 13px; }
  .resource-item strong { font-size: 12px; }
  .resource-icon { width: 35px; height: 35px; }
  .price-card { padding: 23px; }
  .faq-section { padding-top: 0; }
  .faq-layout { gap: 50px; }
  .closing-inner h2 { font-size: 22px; }
}
@media (max-width: 680px) {
  html { scroll-padding-top: 82px; }
  .container { width: calc(100% - 40px); }
  .site-header { height: 65px; }
  .brand img { width: 31px; height: 31px; }
  .brand-name { font-size: 20px; }
  .brand-name > span { display: inline; font-size: 12px; }
  .header-inner { gap: 12px; }
  .desktop-nav { display: none; }
  .header-download { margin-left: auto; padding: 5px 9px; gap: 6px; font-size: 10px; }
  .header-download .icon { width: 13px; height: 13px; }
  .menu-toggle { display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 6px; border: 0; padding: 5px; width: 30px; height: 34px; background: transparent; }
  .menu-toggle > span { height: 1px; width: 18px; background: #465f4e; transition: transform .15s; }
  .menu-toggle[aria-expanded="true"] > span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .menu-toggle[aria-expanded="true"] > span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .hero { background: radial-gradient(ellipse at 70% 70%, #eef9f0, #fff 65%); }
  .hero-layout { grid-template-columns: minmax(0, 1fr); gap: 49px; padding-top: 48px; padding-bottom: 46px; }
  .hero-copy { text-align: center; }
  .hero-eyebrow { justify-content: center; font-size: 11px; margin-bottom: 20px; }
  h1 { font-size: clamp(35px, 8.9vw, 48px); line-height: 1.36; letter-spacing: -1.5px; }
  .hero-description { margin: 20px 0 24px; font-size: 13px; line-height: 1.95; }
  .hero-actions { justify-content: center; gap: 10px; }
  .hero-actions .button { padding: 10px 17px; min-height: 44px; font-size: 12px; }
  .hero-caption { font-size: 10px; margin: 15px 0 20px; }
  .protocol-tags { justify-content: center; font-size: 9px; }
  .protocol-tags > span { padding: 1px 9px; }
  .bridge-visual { max-width: 420px; margin: 0 auto; width: 100%; padding: 0 10px; }
  .flow-card { border-radius: 14px; }
  .flow-heading { padding: 14px 17px; font-size: 10px; }
  .flow-nodes { padding: 25px 20px 12px; }
  .flow-node { width: 76px; }
  .flow-node strong { font-size: 12px; }
  .connection-line { padding-inline: 1px; min-width: 10px; }
  .example-card { margin-inline: 18px; }
  .example-card pre { font-size: 11px; }
  .floating-note { bottom: 28px; right: -2px; }
  .orbit-one { width: 380px; height: 380px; top: -18px; left: calc(50% - 190px); }
  .orbit-two { width: 440px; height: 440px; top: -48px; left: calc(50% - 220px); }
  .flow-directions { font-size: 9px; margin-bottom: 18px; }
  .flow-footer { font-size: 9px; }
  .hero-facts { grid-template-columns: 1fr; gap: 10px; padding-block: 20px; font-size: 10px; }
  .hero-facts > div + div { border-left: 0; }
  .hero-facts > div { gap: 8px; }
  .hero-facts .icon { width: 14px; height: 14px; }
  .section { padding-block: 54px; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 13px; margin-bottom: 29px; }
  .eyebrow { font-size: 10px; margin-bottom: 10px; letter-spacing: .8px; }
  h2 { font-size: 24px; line-height: 1.5; letter-spacing: -.7px; }
  .section-description { font-size: 12px; margin-top: 11px; }
  .section-heading > .text-link { font-size: 11px; padding-bottom: 0; }
  .steps { grid-template-columns: 1fr 1fr; gap: 30px 23px; }
  .step-top { gap: 13px; margin-bottom: 15px; }
  .step-number { width: 29px; height: 29px; font-size: 11px; }
  .step h3 { font-size: 14px; }
  .step > p { font-size: 11px; min-height: 0; margin: 9px 0 12px; }
  .step .text-link { font-size: 10px; gap: 5px; }
  .step .text-link .icon { width: 13px; height: 13px; }
  .edition-label { font-size: 9px; }
  .connection-tabs { grid-template-columns: 1fr; gap: 10px; }
  .connection-tab { padding: 16px 18px; display: grid; grid-template-columns: auto 1fr; gap: 0 16px; align-items: center; position: relative; }
  .tab-top { display: contents; }
  .mode-icon { grid-row: 1 / 3; width: 37px; height: 37px; }
  .tab-type { display: none; }
  .tab-check { position: absolute; top: 19px; right: 17px; }
  .connection-tab > strong { font-size: 16px; grid-column: 2; padding-right: 22px; }
  .connection-tab > span:last-child { font-size: 10px; grid-column: 2; margin-top: 3px; }
  .connection-panel { flex-direction: column; padding: 22px; gap: 21px; min-height: 0; }
  .connection-panel h3 { font-size: 14px; }
  .connection-panel p { font-size: 11px; }
  .connection-panel .panel-note { font-size: 10px; }
  .panel-action { align-items: flex-start; gap: 14px; min-width: 0; }
  .panel-action > code { font-size: 10px; }
  .panel-action .text-link { font-size: 11px; }
  .connection-footnote { font-size: 9px; line-height: 1.9; }
  .docs-grid { grid-template-columns: 1fr; gap: 15px; }
  .doc-card { padding: 22px 23px 0; }
  .doc-card-top { margin-bottom: 14px; }
  .doc-card h3 { font-size: 17px; }
  .doc-card > p { font-size: 12px; margin: 9px 0 15px; min-height: 0; }
  .doc-card > .text-link { margin-bottom: 20px; }
  .doc-card-footer { padding: 15px 0; }
  .doc-card-footer a, .doc-card-footer button { font-size: 10px; }
  .ai-note { align-items: flex-start; flex-wrap: wrap; padding: 19px; gap: 11px; }
  .ai-note-icon { padding-top: 3px; }
  .ai-note p { font-size: 11px; flex-basis: calc(100% - 31px); }
  .ai-note > a { margin-left: 31px; font-size: 11px; }
  .resource-layout { grid-template-columns: 1fr; gap: 30px; }
  .resource-copy h2 br { display: none; }
  .resource-copy > p:not(.eyebrow) { font-size: 11px; margin: 13px 0 17px; }
  .resource-item { padding: 20px 17px; gap: 12px; }
  .resource-item strong { font-size: 12px; }
  .resource-description { font-size: 10px; }
  .resource-disclaimer { font-size: 9px; }
  .pricing-grid { grid-template-columns: 1fr; gap: 13px; }
  .price-card { padding: 22px; display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 0 15px; }
  .plan-name { font-size: 13px; }
  .price { grid-row: 1 / 3; grid-column: 2; margin: 0; text-align: right; font-size: 38px; line-height: 1.5; }
  .price > span { font-size: 17px; vertical-align: 4px; }
  .plan-caption { grid-row: 2; grid-column: 1; margin: 4px 0 0; font-size: 10px; }
  .button-price { grid-column: 1 / -1; margin-top: 17px; font-size: 11px; min-height: 38px; }
  .pricing-currency { font-size: 9px; }
  .authorization-guide { padding: 20px; gap: 12px; }
  .authorization-guide h3 { font-size: 12px; }
  .authorization-guide p { font-size: 11px; }
  .authorization-contact { font-size: 10px; line-height: 1.9; }
  .faq-section { padding-top: 0; }
  .faq-layout { padding-top: 38px; grid-template-columns: 1fr; gap: 30px; }
  .faq-layout h2 br { display: none; }
  .faq-list summary { font-size: 12px; padding-block: 19px; }
  .faq-list details > p { font-size: 11px; }
  .closing-section { padding-block: 35px; }
  .closing-inner { flex-direction: column; align-items: flex-start; gap: 23px; }
  .closing-inner h2 { font-size: 21px; }
  .closing-inner .button { font-size: 11px; min-height: 42px; }
  .footer-inner { flex-wrap: wrap; gap: 17px; font-size: 9px; }
  .footer-brand { font-size: 11px; }
  .footer-inner .brand { gap: 7px; }
  .footer-inner .brand img { width: 25px; height: 25px; }
  .footer-inner > span { margin-left: auto; border-left: 0; padding-left: 0; }
  .footer-inner > div { margin-left: 0; justify-content: space-between; width: 100%; border-top: 1px solid var(--line); padding-top: 15px; gap: 15px; }
  .site-footer { padding-block: 24px; }
  .install-dialog { padding: 23px; }
  .install-dialog h2 { font-size: 21px; }
}
@media (max-width: 360px) {
  .brand-name > span { display: none; }
  .hero-actions .button { padding-inline: 13px; font-size: 11px; gap: 8px; }
  .flow-nodes { padding-inline: 10px; }
  .flow-node { width: 63px; }
  .flow-node strong { font-size: 11px; }
  .flow-node > span { font-size: 8px; }
  .wechat-symbol, .server-symbol { width: 39px; height: 39px; border-radius: 11px; }
  .wechat-symbol svg { width: 33px; height: 33px; }
  .bridge-node > img { width: 43px; height: 43px; }
  .flow-heading { padding-inline: 12px; font-size: 9px; }
  .diagram-label { padding-inline: 4px; }
  .example-card { margin-inline: 12px; }
  .example-card pre { margin-inline: 10px; font-size: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}