/* QuickHostFix — one shared visual system, no external dependencies. */
:root {
  --blue: #2463eb;
  --blue-dark: #174bc0;
  --ink: #132b4b;
  --body: #465b75;
  --muted: #64758b;
  --line: #e1e8f1;
  --wash: #f5f8fd;
  --pale: #edf4ff;
  --white: #fff;
  --green: #16836a;
  --amber: #94601b;
  --red: #c2414b;
  --radius: 16px;
  --shadow: 0 16px 50px -28px #153e793d;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 104px; }
body { margin: 0; color: var(--ink); background: #fff; font: 15px/1.75 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif; -webkit-font-smoothing: antialiased; }
body, button, input, select, textarea { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif; }
button, input, select, textarea { font-size: inherit; }
button, a, input, textarea, select { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
button:disabled { cursor: wait; opacity: .65; }
button, input, textarea, select { border-radius: 8px; }
a { color: inherit; text-decoration: none; }
button, a { touch-action: manipulation; }
a, button { transition: color .18s, background .18s, border-color .18s, box-shadow .18s; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid #85adff; outline-offset: 4px; }
input, textarea, select { min-width: 0; max-width: 100%; }
input::placeholder, textarea::placeholder { color: #8794a6; }
img, svg { vertical-align: middle; }
img { max-width: 100%; height: auto; }
svg.icon { width: 22px; height: 22px; flex-shrink: 0; fill: none; stroke: currentColor; stroke-width: 1.65; stroke-linecap: round; stroke-linejoin: round; }
[hidden] { display: none !important; }
h1, h2, h3, h4, p { margin: 0; }
h1, h2, h3, h4 { font-weight: 650; }
p { color: var(--body); }
ul, ol { padding-left: 1.3em; }
::selection { color: #10377e; background: #d4e5ff; }
.container { width: min(1180px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: -80px; left: 18px; padding: 12px 20px; color: #fff; background: var(--ink); border-radius: 8px; }
.skip-link:focus { top: 10px; }
.site-header { position: sticky; top: 0; z-index: 50; background: #ffffffef; backdrop-filter: blur(16px); border-bottom: 1px solid #e9eef5; }
.nav-bar { display: flex; align-items: center; gap: 32px; height: 82px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark { width: 40px; height: 40px; }
.brand-words { display: flex; flex-direction: column; line-height: 1.35; }
.brand-words strong { font-size: 17px; font-weight: 700; letter-spacing: .5px; }
.brand-words small { font-size: 11px; letter-spacing: .6px; margin-top: 3px; color: #61758f; }
.desktop-nav { margin-left: auto; display: flex; align-items: center; gap: 29px; }
.desktop-nav > a { position: relative; font-size: 14px; white-space: nowrap; color: var(--body); padding-block: 29px; }
.desktop-nav > a:hover, .desktop-nav > a[aria-current] { color: var(--blue); }
.desktop-nav > a[aria-current]::after { content: ''; position: absolute; height: 3px; width: 18px; border-radius: 4px; background: var(--blue); bottom: 17px; left: calc(50% - 9px); }
.nav-cta { min-height: 42px !important; padding: 9px 18px !important; font-size: 13px !important; }
.menu-button { display: none; align-items: center; justify-content: center; border: 1px solid var(--line); background: #fff; color: var(--ink); width: 44px; height: 44px; margin-left: auto; }
.mobile-nav { padding: 4px 24px 18px; background: #fff; border-top: 1px solid var(--line); }
.mobile-nav a { display: block; padding: 11px 8px; border-bottom: 1px solid #f0f3f8; }
.mobile-nav a[aria-current] { color: var(--blue); font-weight: 600; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; padding: 12px 22px; border: 1px solid transparent; border-radius: 8px; font-weight: 600; line-height: 1.4; white-space: nowrap; }
.btn svg.icon { width: 18px; height: 18px; }
.btn-primary { color: #fff; background: var(--blue); border-color: var(--blue); box-shadow: 0 5px 10px -7px #2463eb; }
.btn-primary:hover { color: #fff; background: var(--blue-dark); border-color: var(--blue-dark); }
.btn-secondary { color: var(--ink); background: #fff; border-color: #ced9e7; }
.btn-secondary:hover { border-color: var(--blue); color: var(--blue); background: #fafcff; }
.btn-light { background: #fff; color: var(--blue); }
.btn-quiet { background: transparent; color: var(--body); border: 0; padding: 10px 0; min-height: 40px; }
.text-link { display: inline-flex; align-items: center; gap: 8px; color: var(--blue); font-weight: 600; font-size: 14px; }
.text-link svg { width: 18px; height: 18px; }
.text-link:hover { color: var(--blue-dark); text-decoration: underline; text-underline-offset: 5px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--blue); font-weight: 600; letter-spacing: 1px; }
.eyebrow::before { content: ''; width: 17px; height: 3px; border-radius: 2px; background: currentColor; }
.pill { display: inline-flex; align-items: center; gap: 6px; border: 1px solid #dbe6f8; border-radius: 30px; background: #f0f5ff; color: #38619f; font-size: 12px; padding: 4px 11px; line-height: 1.5; }
.pill i { width: 5px; height: 5px; border-radius: 50%; background: var(--blue); }
.hero-band { position: relative; background: linear-gradient(110deg, #fafcff 0%, #f4f8ff 48%, #eaf2ff 100%); overflow: hidden; }
.hero { display: grid; grid-template-columns: 1.08fr 1fr; gap: 28px; align-items: center; min-height: 470px; padding-top: 47px; padding-bottom: 35px; }
.hero h1 { font-size: clamp(40px, 3.9vw, 56px); line-height: 1.3; letter-spacing: -1.8px; margin: 22px 0 21px; font-weight: 680; }
.hero h1 em { font-style: normal; color: var(--blue); }
.hero .lead { max-width: 490px; font-size: 16px; line-height: 1.95; }
.hero-actions { display: flex; gap: 20px; align-items: center; margin-top: 28px; }
.hero-visual { position: relative; min-width: 0; align-self: stretch; display: flex; align-items: center; justify-content: center; margin: 0; }
.hero-visual img { display: block; width: 100%; max-width: 560px; }
.visual-caption { position: absolute; right: 10px; top: 10px; font-size: 11px; color: #7288a7; letter-spacing: .5px; }
.experience-strip { display: grid; grid-template-columns: 1fr 1fr 1.1fr; padding: 25px 0 29px; border-top: 1px solid #dbe5f3; }
.experience-item { padding-left: 30px; border-left: 1px solid #d5e1f1; }
.experience-item:first-child { padding-left: 0; border: 0; }
.experience-item strong { font-size: 30px; font-weight: 650; line-height: 1.4; letter-spacing: -.5px; }
.experience-item strong b { color: var(--blue); font-weight: 650; }
.experience-item strong small { font-size: 15px; margin-left: 7px; letter-spacing: 0; font-weight: 500; }
.experience-item:last-child strong { font-size: 24px; line-height: 1.8; }
.experience-item p { font-size: 12px; color: var(--muted); margin-top: 3px; }
.quick-check { padding: 29px 0 0; }
.quick-check-card { display: grid; grid-template-columns: .72fr 1fr; gap: 30px; align-items: center; padding: 26px 30px; border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); background: #fff; }
.quick-check-title { display: flex; gap: 14px; align-items: center; }
.icon-box { width: 46px; height: 46px; display: inline-flex; align-items: center; justify-content: center; border-radius: 12px; background: var(--pale); color: var(--blue); flex-shrink: 0; }
.quick-check h2 { font-size: 20px; margin-bottom: 4px; }
.quick-check p { font-size: 12px; }
.url-field { display: flex; gap: 8px; align-items: center; padding: 5px; border: 1px solid #ccd8e9; border-radius: 10px; background: #fff; }
.url-field:focus-within { border-color: var(--blue); box-shadow: 0 0 0 3px #2463eb12; }
.url-field > .icon { margin-left: 10px; width: 19px; color: #7489a5; }
.url-field input { flex: 1; width: 100%; border: 0; padding: 10px 5px; outline: none; background: transparent; font-size: 14px; color: var(--ink); }
.url-field input:focus-visible { outline: none; }
.url-field .btn { min-height: 42px; padding: 11px 17px; font-size: 13px; }
.input-help { font-size: 12px; color: var(--muted); margin-top: 8px; }
.section { padding: 70px 0; }
.section.compact { padding: 55px 0; }
.section-wash { background: var(--wash); }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; margin-bottom: 33px; }
.section-heading h2 { font-size: 30px; line-height: 1.5; margin-top: 9px; letter-spacing: -.7px; }
.section-heading p { margin-top: 8px; font-size: 14px; }
.services-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 30px; }
.service { padding: 0 28px 8px 0; border-right: 1px solid var(--line); }
.service:last-child { border: 0; padding-right: 0; }
.service h3 { font-size: 20px; margin: 18px 0 10px; }
.service p { font-size: 14px; line-height: 1.9; max-width: 320px; }
.service .service-topics { margin: 18px 0 21px; color: #5c7392; font-size: 12px; word-spacing: 10px; }
.knowledge-split { display: grid; grid-template-columns: .7fr 1.3fr; gap: 70px; align-items: start; }
.knowledge-intro h2 { font-size: 30px; line-height: 1.5; margin: 13px 0; letter-spacing: -.6px; }
.knowledge-intro p { font-size: 14px; margin-bottom: 24px; max-width: 300px; }
.article-row { display: grid; grid-template-columns: 1fr 24px; gap: 20px; padding: 24px 0; border-bottom: 1px solid #dfe6f0; }
.article-row:first-child { padding-top: 0; }
.article-row:hover h3 { color: var(--blue); }
.article-row .icon { align-self: center; color: var(--blue); }
.article-row h3 { font-size: 18px; margin: 8px 0 7px; transition: color .18s; }
.article-row p { font-size: 13px; }
.article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 12px; color: var(--muted); }
.category-tag { color: var(--blue); background: #eaf2ff; font-weight: 500; display: inline-flex; border-radius: 5px; padding: 2px 8px; font-size: 12px; }
.contact-ribbon { display: flex; justify-content: space-between; align-items: center; gap: 30px; background: #163c77; color: #fff; border-radius: 16px; padding: 34px 40px; position: relative; overflow: hidden; }
.contact-ribbon::after { content: ''; width: 240px; height: 240px; position: absolute; border: 1px solid #ffffff0d; border-radius: 50%; left: 49%; top: -160px; box-shadow: 0 0 0 45px #ffffff05, 0 0 0 90px #ffffff03; pointer-events: none; }
.contact-ribbon h2 { font-size: 24px; margin-bottom: 7px; }
.contact-ribbon p { color: #c4d5f1; font-size: 14px; }
.site-footer { padding: 40px 0 22px; border-top: 1px solid var(--line); margin-top: 28px; }
.footer-top { display: flex; justify-content: space-between; gap: 36px; align-items: center; }
.footer-brand p { font-size: 12px; margin-top: 12px; }
.footer-links { display: flex; gap: 30px; font-size: 13px; color: var(--body); flex-wrap: wrap; }
.footer-links a:hover { color: var(--blue); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid #edf1f6; padding-top: 18px; margin-top: 29px; font-size: 11px; color: var(--muted); }
.page-heading { padding: 43px 0 29px; }
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; color: var(--muted); font-size: 12px; margin-bottom: 22px; }
.breadcrumb a:hover { color: var(--blue); }
.breadcrumb svg { width: 13px; height: 13px; }
.page-heading h1 { font-size: 38px; line-height: 1.4; letter-spacing: -1px; margin: 9px 0 13px; }
.page-heading > p { max-width: 710px; font-size: 15px; }
.page-heading-row { display: flex; justify-content: space-between; gap: 25px; align-items: flex-end; }
.page-heading-row p { max-width: 700px; }
.page-heading-row .text-link { white-space: nowrap; margin-bottom: 6px; }
.workbench { display: grid; grid-template-columns: minmax(0,1fr) 286px; gap: 28px; align-items: start; margin-bottom: 64px; }
.panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: 0 4px 15px -12px #153e7940; }
.panel-pad { padding: 28px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 20px; }
.panel-head h2 { font-size: 19px; }
.demo-notice { display: flex; align-items: flex-start; gap: 9px; padding: 12px 15px; background: #f0f5ff; border: 1px solid #e0eafd; border-radius: 8px; color: #4f6690; font-size: 12px; line-height: 1.8; }
.demo-notice .icon { width: 16px; height: 16px; margin-top: 2px; }
.demo-notice strong { color: #315c9b; font-weight: 600; }
.scenario-bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin: 22px 0 18px; }
.scenario-bar > span { font-size: 12px; color: var(--muted); }
.segmented { display: inline-flex; gap: 3px; padding: 4px; background: #f0f3f8; border-radius: 9px; flex-wrap: wrap; }
.segmented button { background: transparent; border: 0; padding: 7px 12px; border-radius: 6px; font-size: 12px; color: var(--muted); line-height: 1.5; }
.segmented button[aria-pressed="true"] { background: #fff; color: var(--blue); box-shadow: 0 1px 5px #243c5b12; font-weight: 600; }
.check-form > label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 9px; }
.result-divider { border: 0; border-top: 1px solid var(--line); margin: 26px -28px 0; }
.empty-state { padding: 54px 18px 48px; text-align: center; }
.empty-state .empty-icon { display: inline-flex; align-items: center; justify-content: center; width: 70px; height: 70px; background: #f0f5fc; border: 1px solid #e4ecf7; border-radius: 22px; color: #83a5d4; margin-bottom: 18px; }
.empty-state .icon { width: 33px; height: 33px; }
.empty-state h3 { font-size: 19px; margin-bottom: 9px; }
.empty-state p { font-size: 13px; max-width: 410px; margin: 0 auto 18px; }
.empty-state .mini-scopes { display: flex; justify-content: center; gap: 18px; margin-top: 25px; color: #8190a4; font-size: 12px; flex-wrap: wrap; }
.side-stack { display: grid; gap: 18px; }
.side-card { padding: 23px; border-radius: 12px; border: 1px solid var(--line); background: #fff; }
.side-card h3 { font-size: 16px; margin-bottom: 13px; }
.side-card p, .side-card li { font-size: 13px; line-height: 1.9; }
.side-card ul { margin: 0; padding-left: 17px; color: var(--body); }
.side-card li + li { margin-top: 8px; }
.side-card .text-link { margin-top: 18px; font-size: 13px; }
.side-card.soft { background: #f1f6ff; border-color: #e1eafb; }
.side-card .icon-box { margin-bottom: 16px; background: #fff; border: 1px solid #e0e9f8; }
.side-divider { height: 1px; background: var(--line); margin: 18px 0; }
.side-small { font-size: 12px !important; color: var(--muted); }
.progress-shell { padding: 32px 0; }
.progress-label { display: flex; justify-content: space-between; align-items: center; font-size: 13px; margin-bottom: 15px; }
.progress-track { height: 6px; border-radius: 5px; background: #eaf0f8; overflow: hidden; }
.progress-track span { display: block; height: 100%; width: 0; border-radius: inherit; background: var(--blue); transition: width .4s ease; }
.progress-steps { display: flex; gap: 8px; justify-content: space-between; font-size: 11px; color: var(--muted); margin-top: 15px; flex-wrap: wrap; }
.result-summary { display: flex; gap: 14px; align-items: flex-start; padding: 21px 0; }
.result-summary .status-icon { width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; flex-shrink: 0; background: #e7f6f0; color: var(--green); }
.result-summary.is-error .status-icon { background: #fceff0; color: var(--red); }
.result-summary.is-timeout .status-icon { background: #edf1f7; color: #6b7e97; }
.result-summary h3 { font-size: 18px; margin-bottom: 4px; }
.result-summary p { font-size: 12px; }
.result-row { display: grid; grid-template-columns: 130px 1fr; gap: 15px; padding: 16px 0; border-top: 1px solid #edf1f6; }
.result-row-title { font-size: 13px; font-weight: 600; }
.result-row-content { font-size: 12px; color: var(--body); }
.result-row-content p { font-size: 12px; margin-top: 5px; }
.status-tag { display: inline-flex; align-items: center; gap: 5px; font-size: 11px; padding: 2px 8px; line-height: 1.7; border-radius: 5px; font-weight: 500; }
.status-tag.good { background: #e8f6f0; color: #176e58; }
.status-tag.bad { background: #fff0f1; color: #ac3640; }
.status-tag.advice { background: #fff5e6; color: #86531a; }
.status-tag.unknown { background: #edf1f7; color: #5f728a; }
.result-footer { padding-top: 20px; margin-top: 10px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 16px; align-items: center; }
.result-footer p { font-size: 12px; }
.legend { display: grid; gap: 14px; }
.legend p { margin-top: 4px; font-size: 12px; }
.form-section + .form-section { margin-top: 29px; padding-top: 25px; border-top: 1px solid var(--line); }
.form-section h2 { font-size: 18px; margin-bottom: 17px; }
.field { margin-top: 19px; }
.field:first-child { margin-top: 0; }
.field label, .field-label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 8px; color: var(--ink); }
.field label small, .field-label small { font-size: 11px; color: var(--muted); font-weight: 400; margin-left: 5px; }
.required { color: var(--red); margin-left: 3px; }
.field input:not([type="checkbox"]):not([type="radio"]):not([type="file"]), .field textarea, .field select { display: block; width: 100%; border: 1px solid #cfd9e7; background: #fff; padding: 11px 13px; line-height: 1.7; color: var(--ink); font-size: 14px; }
.field textarea { resize: vertical; min-height: 140px; }
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"] { border-color: var(--red); }
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.field-grid .field { margin-top: 19px; }
.field-error { color: #b13743; font-size: 12px; margin-top: 6px; }
.field-help { font-size: 12px; margin-top: 7px; color: var(--muted); }
.choice-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 9px; }
.choice { position: relative; }
.choice input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.choice label { display: flex; align-items: center; gap: 8px; justify-content: center; padding: 12px 8px; margin: 0; border: 1px solid var(--line); border-radius: 8px; font-size: 13px; cursor: pointer; color: var(--body); font-weight: 400; }
.choice input:checked + label { color: var(--blue); border-color: #8eb3f9; background: #f0f5ff; font-weight: 600; box-shadow: inset 0 0 0 1px #d4e3ff; }
.choice input:focus-visible + label { outline: 3px solid #85adff; outline-offset: 3px; }
.choice label .icon { width: 18px; height: 18px; }
.symptom-options { display: flex; flex-wrap: wrap; gap: 9px; }
.symptom-options label { display: flex; align-items: center; gap: 7px; font-size: 12px; font-weight: 400; border-radius: 6px; padding: 6px 10px; background: #f6f8fc; border: 1px solid #e9eef6; margin: 0; cursor: pointer; }
input[type="checkbox"], input[type="radio"] { accent-color: var(--blue); }
.upload-area { display: flex; gap: 15px; align-items: center; justify-content: center; border: 1px dashed #b9cce7; border-radius: 10px; padding: 23px; background: #fbfcff; cursor: pointer; }
.upload-area .icon { color: var(--blue); width: 26px; height: 26px; }
.upload-area strong { display: block; font-weight: 500; font-size: 13px; }
.upload-area small { display: block; font-weight: 400; font-size: 11px; color: var(--muted); margin-top: 3px; }
.file-input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.file-input:focus-visible + label { outline: 3px solid #85adff; outline-offset: 3px; }
.upload-previews { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 12px; }
.upload-item { width: 110px; border: 1px solid var(--line); border-radius: 8px; padding: 5px; position: relative; }
.upload-item img { width: 98px; height: 70px; object-fit: cover; border-radius: 4px; }
.upload-item span { font-size: 10px; display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.upload-remove { position: absolute; top: 0; right: 0; width: 28px; height: 28px; color: #fff; background: #16365d; border: 0; border-radius: 0 6px 0 6px; }
.checkbox-line { display: flex; gap: 9px; align-items: flex-start; font-size: 12px; color: var(--body); margin-top: 22px; cursor: pointer; }
.checkbox-line input { margin-top: 5px; flex-shrink: 0; width: 15px; height: 15px; }
.form-actions { display: flex; align-items: center; gap: 20px; margin-top: 22px; flex-wrap: wrap; }
.form-actions p { font-size: 12px; }
.form-confirm { margin-top: 22px; padding: 18px; border: 1px solid #bbdccf; border-radius: 9px; background: #f0faf6; }
.form-confirm h3 { font-size: 16px; color: #176e58; margin-bottom: 6px; }
.form-confirm p { font-size: 13px; }
.form-confirm .btn { font-size: 12px; margin-top: 15px; min-height: 40px; }
.tabs { display: flex; gap: 31px; border-bottom: 1px solid var(--line); margin: 0 0 28px; }
.tabs a { padding: 13px 0; font-size: 15px; position: relative; color: var(--muted); }
.tabs a.active { color: var(--blue); font-weight: 600; }
.tabs a.active::after { content: ''; position: absolute; height: 3px; bottom: -1px; left: 0; right: 0; background: var(--blue); border-radius: 4px 4px 0 0; }
.list-toolbar { display: flex; align-items: center; gap: 20px; justify-content: space-between; margin-bottom: 28px; }
.filters { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.filter-btn { border: 1px solid transparent; border-radius: 6px; background: transparent; padding: 7px 13px; font-size: 12px; color: var(--body); }
.filter-btn[aria-pressed="true"] { color: var(--blue); background: #edf4ff; border-color: #dce9ff; font-weight: 600; }
.search-field { border: 1px solid #d5dfeb; display: flex; align-items: center; gap: 8px; padding: 7px 11px; border-radius: 8px; background: #fff; max-width: 240px; }
.search-field svg { width: 17px; height: 17px; color: var(--muted); }
.search-field input { width: 100%; border: 0; outline: none; padding: 3px 0; font-size: 12px; background: transparent; }
.search-field:focus-within { outline: 3px solid #85adff; outline-offset: 2px; }
.feature-article { display: grid; grid-template-columns: 1.6fr 1fr; border: 1px solid #dce6f6; border-radius: 16px; overflow: hidden; background: #f3f7ff; margin-bottom: 32px; }
.feature-article-body { padding: 32px; }
.feature-article h2 { font-size: 26px; line-height: 1.55; margin: 13px 0; max-width: 540px; }
.feature-article p { font-size: 14px; max-width: 520px; }
.feature-article .text-link { margin-top: 22px; }
.feature-illustration { display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg,#edf3ff,#e3edff); padding: 28px; min-height: 245px; }
.layer-diagram { width: 100%; max-width: 250px; }
.layer-diagram span { display: flex; align-items: center; justify-content: space-between; padding: 13px 18px; background: #ffffffc9; border: 1px solid #cadcf8; color: #355a8e; border-radius: 8px; box-shadow: 0 9px 12px -12px #2463eb66; font-size: 13px; }
.layer-diagram span + span { margin-top: 16px; position: relative; }
.layer-diagram span + span::before { content: ''; position: absolute; width: 1px; height: 16px; background: #a0bbeb; top: -17px; left: 50%; }
.layer-diagram b { font-size: 11px; font-weight: 400; color: #6b85af; }
.article-list { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; padding-bottom: 30px; }
.article-card { padding: 25px 23px; border: 1px solid var(--line); border-radius: 12px; background: #fff; display: flex; flex-direction: column; min-height: 240px; }
.article-card:hover { border-color: #b7cdf3; box-shadow: var(--shadow); }
.article-card h3 { font-size: 18px; line-height: 1.65; margin: 14px 0 10px; }
.article-card p { font-size: 13px; margin-bottom: 20px; }
.article-card .text-link { margin-top: auto; font-size: 12px; }
.card-tagline { display: flex; justify-content: space-between; align-items: center; gap: 10px; }
.card-tagline > .icon { color: #9ab2d2; width: 20px; }
.empty-search { padding: 35px; border: 1px dashed #ccdaee; border-radius: 12px; text-align: center; margin: 22px 0 50px; }
.empty-search h3 { font-size: 18px; margin-bottom: 7px; }
.empty-search p { font-size: 13px; }
.case-notice { margin-bottom: 27px; }
.case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; padding-bottom: 40px; }
.case-card { overflow: hidden; border: 1px solid var(--line); border-radius: 15px; }
.case-visual { height: 184px; background: #edf3ff; padding: 27px 30px; display: flex; justify-content: space-between; align-items: center; position: relative; }
.case-visual.alt { background: #eff5f9; }
.case-visual .big-code { font-size: 58px; letter-spacing: -2px; line-height: 1; font-weight: 600; color: #285caa; }
.case-visual .code-label { font-size: 12px; color: #6b81a2; letter-spacing: 2px; margin-top: 10px; }
.case-mini-flow { display: grid; gap: 9px; width: 160px; }
.case-mini-flow span { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px; border: 1px solid #cfdef3; background: #ffffffb8; font-size: 11px; border-radius: 5px; color: #56719b; }
.case-mini-flow span:last-child { background: #e3edff; color: var(--blue); border-color: #bcd0ef; }
.case-content { padding: 24px 27px 28px; }
.case-content h2 { font-size: 21px; line-height: 1.65; margin: 13px 0 10px; }
.case-content p { font-size: 13px; }
.case-content .text-link { margin-top: 21px; }
.demo-badge { display: inline-flex; padding: 3px 8px; border: 1px solid #eadbc5; border-radius: 5px; color: #8b642d; font-size: 11px; background: #fffbf5; }
.reading-layout { display: grid; grid-template-columns: minmax(0,810px) 250px; gap: 65px; align-items: start; padding-bottom: 55px; }
.article-header { padding-bottom: 29px; border-bottom: 1px solid var(--line); margin-bottom: 32px; }
.article-header h1 { font-size: 34px; line-height: 1.55; letter-spacing: -.7px; margin: 15px 0 15px; }
.article-header .article-deck { font-size: 16px; margin-top: 18px; line-height: 1.9; }
.article-body { font-size: 15px; line-height: 1.95; color: var(--body); }
.article-body section + section { margin-top: 32px; }
.article-body h2 { font-size: 23px; line-height: 1.6; margin-bottom: 13px; color: var(--ink); }
.article-body h3 { color: var(--ink); font-size: 17px; margin: 20px 0 10px; }
.article-body p + p { margin-top: 15px; }
.article-body li + li { margin-top: 8px; }
.article-body strong { color: #2a435f; font-weight: 600; }
.article-body code { padding: 2px 6px; background: #eff3f8; border-radius: 4px; color: #385780; font-size: .88em; overflow-wrap: anywhere; }
.article-body .note, .article-body .callout, .article-body blockquote { padding: 17px 21px; background: #f1f6ff; border-left: 3px solid #84aaf0; margin: 19px 0; font-size: 14px; }
.article-body table { width: 100%; border-collapse: collapse; font-size: 13px; margin: 20px 0; }
.article-body th, .article-body td { padding: 11px; border: 1px solid var(--line); vertical-align: top; text-align: left; }
.article-body th { background: var(--wash); color: var(--ink); }
.source-list { margin-top: 35px; padding: 23px; border: 1px solid var(--line); border-radius: 10px; font-size: 12px; background: #fafcff; }
.source-list h2 { font-size: 15px; margin-bottom: 8px; }
.source-list ul { margin: 0; }
.source-list a { color: var(--blue); overflow-wrap: anywhere; }
.source-list li + li { margin-top: 6px; }
.reading-sidebar { position: sticky; top: 112px; }
.toc { padding-left: 20px; border-left: 1px solid var(--line); margin-bottom: 28px; }
.toc h2 { font-size: 13px; color: #8a98aa; margin-bottom: 14px; font-weight: 500; }
.toc a { display: block; font-size: 13px; color: var(--body); line-height: 1.6; padding: 7px 0; }
.toc a:hover { color: var(--blue); }
.article-bottom { border-top: 1px solid var(--line); margin-top: 35px; padding-top: 23px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.about-intro { display: grid; grid-template-columns: 1.1fr .9fr; gap: 58px; padding: 45px 0 48px; align-items: center; }
.about-intro h1 { font-size: 40px; line-height: 1.5; letter-spacing: -1px; margin: 18px 0 20px; }
.about-intro p { font-size: 15px; line-height: 2; }
.about-intro p + p { margin-top: 15px; }
.about-identity { background: #f1f6ff; border: 1px solid #dee8f8; border-radius: 16px; padding: 32px; position: relative; overflow: hidden; }
.identity-symbol { width: 60px; height: 60px; display: grid; place-items: center; background: #fff; color: var(--blue); border: 1px solid #dbe7f9; border-radius: 16px; margin-bottom: 24px; }
.identity-symbol svg { width: 30px; height: 30px; }
.about-identity h2 { font-size: 22px; }
.about-identity > p { font-size: 13px; color: #5f7694; margin-top: 7px; }
.identity-stats { display: grid; grid-template-columns: 1fr 1fr; margin-top: 24px; padding-top: 22px; border-top: 1px solid #d6e3f7; }
.identity-stats strong { display: block; color: var(--blue); font-size: 31px; font-weight: 650; }
.identity-stats span { font-size: 11px; color: #607794; }
.direction-list { border-top: 1px solid var(--line); }
.direction-row { display: grid; grid-template-columns: 255px 1fr; gap: 30px; border-bottom: 1px solid var(--line); padding: 26px 0; }
.direction-name { display: flex; align-items: center; gap: 14px; }
.direction-name h3 { font-size: 19px; }
.direction-row p { font-size: 14px; }
.direction-row .prepare { margin-top: 9px; color: #7a889b; font-size: 12px; }
.cooperation-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 65px; }
.cooperation-layout h2 { font-size: 30px; line-height: 1.5; margin: 13px 0; }
.cooperation-layout p { font-size: 14px; }
.principle-list { margin: 0; }
.principle-list div { display: grid; grid-template-columns: 100px 1fr; gap: 18px; border-bottom: 1px solid #dfe7f1; padding: 16px 0; }
.principle-list div:first-child { padding-top: 0; }
.principle-list dt { font-size: 14px; font-weight: 600; }
.principle-list dd { font-size: 13px; color: var(--body); margin: 0; }
.contact-section { display: flex; justify-content: space-between; gap: 45px; align-items: center; padding: 45px 0; }
.contact-section h2 { font-size: 28px; margin-bottom: 10px; }
.contact-section p { font-size: 14px; max-width: 610px; }
.contact-method { flex-shrink: 0; display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.wechat { padding: 12px 16px; border: 1px solid var(--line); background: #f8faff; border-radius: 8px; display: flex; align-items: center; gap: 13px; }
.wechat span { font-size: 12px; color: var(--muted); }
.wechat strong { font-size: 16px; font-weight: 600; }
.copy-button { color: var(--blue); padding: 6px; background: transparent; border: 0; }
.copy-button svg { width: 17px; height: 17px; }
.records-layout { max-width: 900px; margin: 0 auto 65px; }
.records-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 18px; }
.records-toolbar h2 { font-size: 18px; }
.records-toolbar .btn { min-height: 36px; padding: 8px 12px; font-size: 12px; }
.records-empty { padding: 55px 30px; }
.records-note { margin: 20px 0 27px; }
.record-card { border: 1px solid var(--line); border-radius: 12px; margin-bottom: 16px; overflow: hidden; }
.record-card summary { padding: 21px 24px; display: flex; justify-content: space-between; gap: 20px; align-items: center; cursor: pointer; list-style: none; }
.record-card summary::-webkit-details-marker { display: none; }
.record-card summary h3 { font-size: 15px; }
.record-card summary p { font-size: 11px; margin-top: 4px; color: var(--muted); }
.record-card summary .record-status { display: flex; align-items: center; gap: 13px; flex-shrink: 0; }
.record-body { border-top: 1px solid var(--line); padding: 21px 24px; background: #fafcff; }
.record-body p { font-size: 13px; white-space: pre-wrap; overflow-wrap: anywhere; }
.record-body h4 { font-size: 13px; margin-bottom: 8px; }
.reply-box { padding: 17px; background: #edf4ff; border: 1px solid #dce8fa; border-radius: 8px; margin-top: 17px; }
.reply-box h4 { color: #2b5aa4; }
.record-actions { display: flex; justify-content: flex-end; margin-top: 15px; }
.record-actions button { color: #a04551; background: transparent; border: 0; font-size: 12px; padding: 6px 0; }
.toast { position: fixed; left: 50%; bottom: 25px; z-index: 100; transform: translateX(-50%); color: #fff; background: #153354; padding: 11px 20px; border-radius: 9px; font-size: 13px; box-shadow: 0 6px 25px #102b4e25; max-width: calc(100% - 32px); text-align: center; }
.screen-reader { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.mobile-break { display: none; }
@media (max-width:1100px) {
  .desktop-nav { gap: 20px; }
  .nav-bar { gap: 22px; }
  .desktop-nav .record-nav { display: none; }
  .hero h1 { font-size: 46px; }
  .hero { gap: 10px; }
  .experience-item strong { font-size: 28px; }
  .experience-item:last-child strong { font-size: 21px; }
  .quick-check-card { grid-template-columns: .8fr 1fr; gap: 20px; padding: 24px; }
  .quick-check-title { gap: 10px; }
  .quick-check-title .icon-box { display: none; }
  .workbench { grid-template-columns: minmax(0,1fr) 250px; gap: 22px; }
  .panel-pad { padding: 23px; }
  .result-divider { margin-inline: -23px; }
  .reading-layout { gap: 36px; grid-template-columns: minmax(0,1fr) 220px; }
}
@media (max-width:850px) {
  .container { width: calc(100% - 40px); }
  .desktop-nav, .nav-bar > .nav-cta { display: none; }
  .menu-button { display: inline-flex; }
  .nav-bar { height: 72px; }
  .hero { min-height: auto; padding: 38px 0 28px; }
  .hero h1 { font-size: 39px; }
  .hero .lead { font-size: 14px; }
  .hero-actions { gap: 16px; margin-top: 22px; flex-wrap: wrap; }
  .hero-actions .btn { padding: 11px 17px; }
  .hero-actions .text-link { font-size: 12px; }
  .hero-visual { margin-right: -15px; }
  .experience-item { padding-left: 22px; }
  .quick-check-card { grid-template-columns: 1fr; gap: 18px; }
  .quick-check-title .icon-box { display: inline-flex; }
  .section { padding: 52px 0; }
  .services-grid { gap: 20px; }
  .service { padding-right: 20px; }
  .service h3 { font-size: 18px; }
  .service p { font-size: 13px; }
  .knowledge-split { gap: 40px; grid-template-columns: .8fr 1.2fr; }
  .knowledge-intro h2 { font-size: 26px; }
  .workbench { grid-template-columns: minmax(0,1fr); }
  .side-stack { grid-template-columns: 1fr 1fr; }
  .side-stack .side-card:last-child:nth-child(odd) { grid-column: 1 / -1; }
  .reading-layout { grid-template-columns: minmax(0,1fr); }
  .reading-sidebar { position: static; display: none; }
  .article-list { gap: 16px; }
  .article-card { padding: 21px 18px; }
  .article-card h3 { font-size: 16px; }
  .about-intro { gap: 30px; }
  .about-intro h1 { font-size: 33px; }
  .about-identity { padding: 25px; }
  .direction-row { grid-template-columns: 215px 1fr; gap: 25px; }
  .cooperation-layout { gap: 35px; }
  .cooperation-layout h2 { font-size: 26px; }
  .contact-section { gap: 28px; }
}
@media (max-width:600px) {
  .mobile-break { display: initial; }
  html { scroll-padding-top: 87px; }
  .container { width: calc(100% - 36px); }
  body { font-size: 14px; }
  .nav-bar { height: 68px; }
  .brand-mark { width: 35px; height: 35px; }
  .brand-words strong { font-size: 15px; }
  .brand-words small { font-size: 10px; }
  .hero { display: flex; flex-direction: column; gap: 12px; padding: 32px 0 13px; align-items: stretch; }
  .hero h1 { font-size: 37px; line-height: 1.36; letter-spacing: -1px; margin: 19px 0 15px; }
  .hero .lead { font-size: 14px; line-height: 1.9; max-width: 355px; }
  .hero-actions { margin-top: 22px; gap: 22px; }
  .hero-actions .text-link { font-size: 13px; }
  .hero-visual { align-self: stretch; margin: 0 0 -2px; min-height: 230px; }
  .hero-visual img { width: 100%; max-width: 360px; }
  .visual-caption { top: 10px; right: 0; font-size: 10px; }
  .experience-strip { padding: 21px 0 24px; grid-template-columns: 1fr 1fr; gap: 15px; }
  .experience-item { padding-left: 21px; }
  .experience-item strong { font-size: 28px; }
  .experience-item strong small { font-size: 13px; }
  .experience-item p { font-size: 10px; }
  .experience-item:last-child { display: none; }
  .quick-check { padding-top: 22px; }
  .quick-check-card { padding: 22px 18px; gap: 18px; border-radius: 12px; }
  .quick-check h2 { font-size: 18px; }
  .quick-check p { font-size: 11px; }
  .quick-check-title .icon-box { width: 39px; height: 39px; border-radius: 10px; }
  .url-field { gap: 2px; }
  .url-field > .icon { display: none; }
  .url-field input { font-size: 12px; padding-left: 6px; }
  .url-field .btn { font-size: 12px; padding: 10px 12px; min-height: 42px; }
  .url-field .btn .icon { display: none; }
  .input-help { font-size: 10px; }
  .section, .section.compact { padding: 42px 0; }
  .section-heading { margin-bottom: 25px; gap: 15px; }
  .section-heading h2 { font-size: 25px; }
  .section-heading p { font-size: 13px; }
  .section-heading > .text-link { display: none; }
  .services-grid { grid-template-columns: 1fr; gap: 0; }
  .service { position: relative; padding: 23px 0 23px 60px; border-right: 0; border-bottom: 1px solid var(--line); }
  .service:first-child { padding-top: 0; }
  .service:last-child { padding-bottom: 0; padding-right: 0; }
  .service .icon-box { position: absolute; left: 0; width: 42px; height: 42px; border-radius: 11px; }
  .service h3 { margin: 0 0 8px; font-size: 18px; }
  .service p { font-size: 13px; max-width: none; }
  .service .service-topics { font-size: 11px; margin: 12px 0; }
  .service .text-link { font-size: 12px; }
  .knowledge-split { grid-template-columns: 1fr; gap: 28px; }
  .knowledge-intro h2 { font-size: 26px; }
  .knowledge-intro p { max-width: none; margin-bottom: 16px; font-size: 13px; }
  .article-row { padding: 20px 0; gap: 14px; }
  .article-row h3 { font-size: 17px; }
  .article-row p { font-size: 12px; }
  .contact-ribbon { padding: 26px 23px; display: block; border-radius: 12px; }
  .contact-ribbon h2 { font-size: 22px; }
  .contact-ribbon p { font-size: 13px; }
  .contact-ribbon .btn { margin-top: 20px; min-height: 43px; font-size: 13px; }
  .site-footer { padding-top: 30px; margin-top: 4px; }
  .footer-top { display: block; }
  .footer-links { margin-top: 23px; gap: 12px 22px; font-size: 12px; }
  .footer-brand p { font-size: 11px; }
  .footer-bottom { display: block; margin-top: 25px; font-size: 10px; }
  .footer-bottom span { display: block; margin-top: 4px; }
  .page-heading { padding: 29px 0 24px; }
  .breadcrumb { font-size: 11px; margin-bottom: 17px; }
  .page-heading h1 { font-size: 28px; margin-top: 10px; letter-spacing: -.6px; }
  .page-heading > p, .page-heading-row p { font-size: 13px; }
  .page-heading-row { display: block; }
  .page-heading-row .text-link { margin-top: 15px; font-size: 12px; }
  .workbench { gap: 22px; margin-bottom: 36px; }
  .panel-pad { padding: 20px 17px; }
  .panel-head { margin-bottom: 16px; }
  .panel-head h2 { font-size: 17px; }
  .demo-notice { padding: 10px 12px; font-size: 11px; gap: 7px; }
  .scenario-bar { flex-direction: column; align-items: flex-start; gap: 10px; margin-top: 19px; }
  .segmented { width: 100%; }
  .segmented button { flex: 1; padding: 8px; font-size: 11px; }
  .result-divider { margin-inline: -17px; margin-top: 22px; }
  .empty-state { padding: 37px 7px 27px; }
  .empty-state h3 { font-size: 17px; }
  .empty-state p { font-size: 12px; }
  .empty-state .mini-scopes { gap: 12px; font-size: 10px; }
  .side-stack { grid-template-columns: 1fr; gap: 15px; }
  .side-card { padding: 21px; }
  .side-card h3 { font-size: 16px; }
  .side-card li, .side-card p { font-size: 12px; }
  .result-summary h3 { font-size: 16px; }
  .result-summary { gap: 11px; }
  .result-summary .status-icon { width: 36px; height: 36px; }
  .result-row { grid-template-columns: 91px 1fr; gap: 11px; padding: 14px 0; }
  .result-row-title { font-size: 12px; }
  .result-row-content, .result-row-content p { font-size: 11px; }
  .result-footer { display: block; }
  .result-footer .text-link { margin-top: 12px; font-size: 13px; }
  .field { margin-top: 18px; }
  .field-grid { grid-template-columns: 1fr; gap: 0; }
  .choice-grid { grid-template-columns: repeat(2,1fr); }
  .choice label { font-size: 12px; padding: 12px 7px; }
  .symptom-options { gap: 7px; }
  .symptom-options label { padding: 6px 8px; font-size: 11px; }
  .field input:not([type="checkbox"]):not([type="radio"]):not([type="file"]), .field textarea, .field select { font-size: 16px; padding: 10px 12px; }
  .field textarea { min-height: 160px; }
  .field-help, .field-error { font-size: 11px; }
  .upload-area { padding: 21px 12px; gap: 11px; }
  .upload-area strong { font-size: 12px; }
  .upload-area small { font-size: 10px; }
  .form-actions { display: block; }
  .form-actions .btn { width: 100%; }
  .form-actions p { text-align: center; margin-top: 10px; font-size: 11px; }
  .form-confirm h3 { font-size: 15px; }
  .form-confirm p { font-size: 12px; }
  .tabs { margin-bottom: 21px; }
  .tabs a { font-size: 14px; padding: 10px 0; }
  .list-toolbar { align-items: flex-start; gap: 15px; flex-direction: column-reverse; }
  .search-field { max-width: none; width: 100%; padding: 9px 12px; }
  .search-field input { font-size: 13px; }
  .filters { gap: 5px; }
  .filter-btn { padding: 6px 9px; font-size: 11px; }
  .feature-article { grid-template-columns: 1fr; margin-bottom: 23px; }
  .feature-article-body { padding: 24px 21px; }
  .feature-article h2 { font-size: 22px; }
  .feature-article p { font-size: 13px; }
  .feature-illustration { min-height: 160px; padding: 22px; }
  .layer-diagram { max-width: none; display: flex; gap: 12px; }
  .layer-diagram span { flex: 1; display: block; padding: 13px 8px; text-align: center; font-size: 12px; }
  .layer-diagram b { display: block; margin-top: 6px; font-size: 10px; }
  .layer-diagram span + span { margin: 0; }
  .layer-diagram span + span::before { width: 12px; height: 1px; top: 50%; left: -13px; }
  .article-list { grid-template-columns: 1fr; gap: 15px; padding-bottom: 20px; }
  .article-card { padding: 22px; min-height: 0; }
  .article-card h3 { font-size: 18px; }
  .case-grid { grid-template-columns: 1fr; gap: 22px; padding-bottom: 30px; }
  .case-visual { height: 160px; padding: 24px; }
  .case-visual .big-code { font-size: 49px; }
  .case-mini-flow { width: 143px; }
  .case-content { padding: 22px; }
  .case-content h2 { font-size: 20px; }
  .article-header h1 { font-size: 28px; line-height: 1.55; }
  .article-header .article-deck { font-size: 14px; }
  .article-body { font-size: 14px; line-height: 1.95; }
  .article-body h2 { font-size: 21px; }
  .article-body h3 { font-size: 16px; }
  .article-body .note, .article-body .callout, .article-body blockquote { padding: 15px 17px; font-size: 13px; }
  .article-body table { font-size: 11px; }
  .article-body th, .article-body td { padding: 8px; overflow-wrap: anywhere; }
  .reading-layout { padding-bottom: 28px; }
  .article-bottom { flex-wrap: wrap; }
  .article-bottom .btn { font-size: 12px; min-height: 42px; }
  .source-list { padding: 18px; font-size: 11px; }
  .about-intro { grid-template-columns: 1fr; gap: 28px; padding: 31px 0; }
  .about-intro h1 { font-size: 32px; margin: 15px 0; }
  .about-intro p { font-size: 14px; }
  .about-identity { padding: 24px; }
  .identity-symbol { float: right; margin: 0; width: 49px; height: 49px; border-radius: 12px; }
  .about-identity h2 { font-size: 20px; }
  .about-identity > p { font-size: 12px; }
  .identity-stats { margin-top: 20px; padding-top: 18px; }
  .direction-row { grid-template-columns: 1fr; gap: 15px; padding: 23px 0; }
  .direction-name h3 { font-size: 18px; }
  .direction-name .icon-box { width: 39px; height: 39px; border-radius: 10px; }
  .direction-row p { font-size: 13px; }
  .direction-row .prepare { font-size: 11px; }
  .cooperation-layout { grid-template-columns: 1fr; gap: 27px; }
  .cooperation-layout h2 { font-size: 27px; }
  .cooperation-layout p { font-size: 13px; }
  .principle-list div { grid-template-columns: 70px 1fr; gap: 17px; padding: 14px 0; }
  .principle-list dt { font-size: 13px; }
  .principle-list dd { font-size: 12px; }
  .contact-section { display: block; padding: 35px 0; }
  .contact-section h2 { font-size: 25px; }
  .contact-section p { font-size: 13px; }
  .contact-method { margin-top: 24px; }
  .wechat { padding: 12px 15px; }
  .records-toolbar { gap: 12px; }
  .records-toolbar h2 { font-size: 16px; }
  .records-toolbar .btn { font-size: 11px; }
  .records-empty { padding: 38px 18px; }
  .record-card summary { padding: 18px; gap: 13px; }
  .record-card summary h3 { font-size: 13px; }
  .record-card summary p { font-size: 10px; }
  .record-card summary .record-status { gap: 8px; }
  .record-body { padding: 18px; }
  .record-body p { font-size: 12px; }
  .records-layout { margin-bottom: 35px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* V2 — existing-system problems, architecture context, and useful queries. */
.hero-context { display: flex; flex-wrap: wrap; gap: 8px 15px; margin-top: 25px; color: #60789b; font-size: 11px; }
.hero-context span { display: inline-flex; align-items: center; gap: 7px; }
.hero-context span::before { content: ''; width: 4px; height: 4px; background: #7fa5e8; border-radius: 50%; }
.home-problems { padding-top: 56px; }
.problem-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
.problem-card { display: flex; flex-direction: column; padding: 25px; border: 1px solid var(--line); border-radius: 14px; background: #fff; transition: border-color .2s, box-shadow .2s, transform .2s; }
.problem-card:hover { border-color: #b6cdf5; box-shadow: 0 12px 30px -20px #174bc070; transform: translateY(-3px); }
.problem-card:nth-child(-n+2) { background: linear-gradient(145deg,#f9fbff,#fff); border-color: #cadbf8; }
.problem-card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 17px; }
.problem-number { color: #a2b4d0; font-size: 12px; letter-spacing: 1.5px; font-variant-numeric: tabular-nums; }
.problem-card h3 { font-size: 20px; line-height: 1.5; margin-bottom: 9px; }
.problem-card > p { font-size: 13px; line-height: 1.85; }
.problem-card-method { font-size: 12px; color: #5c7699; border-top: 1px solid #eaf0f8; margin-top: auto; padding-top: 14px; display: block; }
.problem-card > p + .problem-card-method { margin-top: 18px; }
.problem-card > .text-link { font-size: 12px; margin-top: 17px; }
.problem-card .icon-box { width: 42px; height: 42px; border-radius: 10px; }
.capability-after { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 22px 3px 0; }
.capability-after p { font-size: 12px; }
.capability-after .text-link { white-space: nowrap; font-size: 13px; }
.home-tools { display: grid; grid-template-columns: .83fr 1.17fr; align-items: center; gap: 75px; }
.home-tools h2 { font-size: 30px; line-height: 1.5; margin: 11px 0 15px; letter-spacing: -.6px; }
.home-tools p { font-size: 14px; max-width: 370px; margin-bottom: 20px; }
.home-tool-entry { padding: 30px; border: 1px solid #dbe5f3; border-radius: 16px; background: linear-gradient(160deg,#f7faff,#fff); }
.home-tool-entry label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 13px; }
.home-tool-entry .input-help { font-size: 11px; margin: 10px 0 0; }
.home-tool-links { display: grid; grid-template-columns: repeat(3,1fr); gap: 13px; border-top: 1px solid var(--line); padding-top: 21px; margin-top: 23px; }
.home-tool-links a { display: flex; gap: 7px; align-items: center; font-size: 12px; color: #426a9e; }
.home-tool-links a:hover { color: var(--blue); }
.home-tool-links svg { width: 17px; height: 17px; }
.practice-map { padding-bottom: 65px; }
.practice-jump { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 28px; }
.practice-jump a { display: inline-flex; align-items: center; gap: 15px; padding: 10px 18px; border: 1px solid #d8e3f2; border-radius: 8px; font-size: 13px; background: #fff; color: #45648d; }
.practice-jump a:hover { color: var(--blue); border-color: #b4cbf3; }
.practice-jump svg { width: 15px; height: 15px; }
.practice-detail { background: #fff; border: 1px solid #dce6f4; border-radius: 16px; padding: 34px 38px; margin-top: 24px; scroll-margin-top: 110px; }
.practice-detail-head { display: grid; grid-template-columns: 54px 1fr; align-items: start; gap: 21px; padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.practice-index { color: #7b9cce; font-size: 30px; font-weight: 500; line-height: 1.3; letter-spacing: -1px; }
.practice-detail h3 { font-size: 24px; margin-bottom: 11px; line-height: 1.4; }
.practice-detail-head p { max-width: 850px; font-size: 14px; }
.tech-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 17px; }
.tech-tags span { font-size: 11px; color: #49678e; padding: 4px 9px; border: 1px solid #e0e8f3; background: #f7faff; border-radius: 5px; }
.practice-detail-grid { display: grid; grid-template-columns: 1.35fr .9fr; gap: 45px; padding-top: 26px; }
.small-section-title { font-size: 12px; color: #7c8ca2; font-weight: 500; letter-spacing: .5px; margin-bottom: 18px; }
.practice-focus-item { display: grid; grid-template-columns: 25px 1fr; gap: 12px; margin-bottom: 20px; }
.practice-focus-item:last-child { margin-bottom: 0; }
.practice-focus-item > span { width: 24px; height: 24px; display: grid; place-items: center; background: #eff5ff; border-radius: 6px; color: #567fb9; font-size: 10px; margin-top: 1px; }
.practice-focus-item h4 { font-size: 15px; margin-bottom: 6px; }
.practice-focus-item p { font-size: 13px; }
.practice-questions { background: #f5f8fd; border-radius: 12px; padding: 23px; align-self: stretch; }
.practice-questions > h4 { font-size: 14px; }
.practice-questions ul { padding-left: 17px; font-size: 13px; color: #566c89; margin: 14px 0 22px; }
.practice-questions li + li { margin-top: 12px; }
.related-reading { display: flex; flex-direction: column; gap: 10px; padding-top: 15px; border-top: 1px solid #dce6f4; }
.related-reading > span { font-size: 11px; color: #778da8; }
.related-reading a { font-size: 12px; line-height: 1.8; justify-content: space-between; }
.related-reading svg { width: 15px; height: 15px; }
.problem-jump { display: flex; gap: 10px; flex-wrap: wrap; padding: 0 0 30px; }
.problem-jump a { border: 1px solid var(--line); border-radius: 8px; padding: 8px 13px; font-size: 12px; color: #466994; }
.problem-jump a:hover { border-color: #b4caf0; background: #f7faff; color: var(--blue); }
.problem-details { padding-top: 35px; padding-bottom: 35px; }
.problem-detail { background: #fff; border: 1px solid #dce5f1; border-radius: 16px; padding: 32px 36px; margin: 0 0 25px; scroll-margin-top: 110px; }
.problem-detail:last-child { margin: 0; }
.problem-detail-heading { display: flex; gap: 22px; align-items: flex-start; }
.problem-detail-heading .icon-box { width: 49px; height: 49px; margin-top: 5px; }
.problem-detail-heading .eyebrow { font-size: 10px; letter-spacing: 1.4px; }
.problem-detail-heading .eyebrow::before { display: none; }
.problem-detail-heading h2 { font-size: 24px; line-height: 1.5; margin: 4px 0 9px; }
.problem-detail-heading p { font-size: 14px; max-width: 820px; }
.problem-signals { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 25px 0 22px; }
.problem-signals span { background: #f3f7fd; border-radius: 5px; font-size: 12px; color: #567399; padding: 5px 10px; }
.problem-signals span:first-child { padding-left: 0; background: none; color: #7a8ca5; margin-right: 4px; }
.problem-steps { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 28px; border-top: 1px solid #e6edf6; padding-top: 23px; }
.problem-steps > div { position: relative; }
.problem-steps span { color: #8ba8cf; font-size: 12px; display: block; margin-bottom: 8px; }
.problem-steps h4 { font-size: 16px; margin-bottom: 7px; }
.problem-steps p { font-size: 13px; }
.problem-detail-bottom { display: flex; justify-content: space-between; align-items: center; gap: 25px; margin-top: 26px; padding-top: 20px; border-top: 1px solid #e6edf6; }
.problem-detail-bottom > div { display: flex; flex-wrap: wrap; gap: 9px 20px; }
.problem-detail-bottom > div .text-link { font-size: 12px; }
.problem-detail-bottom .btn { font-size: 12px; min-height: 42px; }
.method-strip { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 30px; }
.method-strip b { font-weight: 500; color: #84a4d2; font-size: 18px; }
.method-strip h3 { font-size: 18px; margin: 10px 0 7px; }
.method-strip p { font-size: 13px; }
.article-list { grid-template-columns: repeat(3,minmax(0,1fr)); }
.list-toolbar { flex-wrap: wrap; }
.list-toolbar .filters { flex-wrap: wrap; }
.desktop-nav { gap: 25px; }
.nav-bar { gap: 28px; }
.footer-links { flex-wrap: wrap; }
@media (max-width: 1100px) {
  .desktop-nav { gap: 18px; }
  .nav-bar { gap: 20px; }
  .home-tools { gap: 38px; }
  .problem-card { padding: 21px; }
  .hero-actions { gap: 15px; flex-wrap: wrap; }
  .hero-actions > .text-link { font-size: 13px; }
}
@media (max-width: 850px) {
  .problem-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .practice-detail-grid { gap: 25px; grid-template-columns: 1.2fr 1fr; }
  .practice-detail { padding: 27px; }
  .home-tools { grid-template-columns: 1fr 1.2fr; gap: 28px; }
  .home-tool-entry { padding: 23px; }
  .home-tool-links { gap: 8px; }
  .home-tool-links a { font-size: 11px; }
  .home-tool-links a svg { display: none; }
  .problem-steps { gap: 20px; }
  .problem-detail { padding: 27px; }
  .method-strip { gap: 20px; grid-template-columns: repeat(2,minmax(0,1fr)); }
  .article-list { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .capability-after { align-items: flex-start; flex-direction: column; gap: 12px; }
}
@media (max-width: 600px) {
  .hero-context { font-size: 10px; margin-top: 20px; }
  .hero .lead { font-size: 14px; }
  .hero-actions { gap: 17px; }
  .hero-actions > .btn { font-size: 12px; padding: 13px 16px; }
  .hero-actions > .text-link { font-size: 12px; }
  .desktop-break { display: none; }
  .home-problems { padding-top: 34px; }
  .problem-grid { grid-template-columns: 1fr; gap: 13px; }
  .problem-card { padding: 22px; }
  .problem-card-top { margin-bottom: 12px; }
  .problem-card h3 { font-size: 20px; }
  .problem-card-method { font-size: 11px; padding-top: 11px; }
  .problem-card > p + .problem-card-method { margin-top: 13px; }
  .problem-card > .text-link { margin-top: 13px; }
  .capability-after { padding-top: 17px; gap: 11px; }
  .capability-after p { font-size: 11px; }
  .capability-after .text-link { white-space: normal; font-size: 12px; }
  .home-tools { grid-template-columns: 1fr; gap: 24px; }
  .home-tools h2 { font-size: 26px; margin: 10px 0 12px; }
  .home-tools p { font-size: 13px; margin-bottom: 16px; }
  .home-tool-entry { padding: 22px 17px; }
  .home-tool-entry .url-field .btn { padding: 11px 13px; }
  .home-tool-links { margin-top: 18px; padding-top: 18px; }
  .home-tool-links a { font-size: 12px; }
  .home-tool-links a svg { display: block; width: 15px; height: 15px; }
  .practice-map { padding-bottom: 35px; }
  .practice-detail { padding: 23px 20px; margin-top: 18px; scroll-margin-top: 82px; }
  .practice-detail-head { grid-template-columns: 32px 1fr; gap: 12px; padding-bottom: 21px; }
  .practice-index { font-size: 24px; }
  .practice-detail h3 { font-size: 21px; }
  .practice-detail-head p { font-size: 13px; }
  .tech-tags { gap: 6px; }
  .tech-tags span { padding: 3px 7px; font-size: 10px; }
  .practice-detail-grid { grid-template-columns: 1fr; gap: 23px; padding-top: 21px; }
  .practice-focus-item { grid-template-columns: 23px 1fr; gap: 10px; }
  .practice-focus-item h4 { font-size: 14px; }
  .practice-focus-item p, .practice-questions ul { font-size: 12px; }
  .practice-questions { padding: 20px; }
  .practice-jump { gap: 8px; margin-bottom: 20px; }
  .practice-jump a { padding: 8px 10px; font-size: 11px; gap: 6px; }
  .problem-jump { padding-bottom: 23px; gap: 7px; }
  .problem-jump a { font-size: 11px; padding: 7px 10px; }
  .problem-details { padding-top: 22px; padding-bottom: 22px; }
  .problem-detail { padding: 23px 20px; margin-bottom: 17px; scroll-margin-top: 82px; }
  .problem-detail-heading { gap: 12px; }
  .problem-detail-heading .icon-box { width: 35px; height: 35px; border-radius: 9px; }
  .problem-detail-heading .icon { width: 19px; height: 19px; }
  .problem-detail-heading h2 { font-size: 20px; margin-top: 5px; }
  .problem-detail-heading p { font-size: 12px; }
  .problem-signals { gap: 6px; margin: 20px 0; }
  .problem-signals span { font-size: 10px; padding: 4px 8px; }
  .problem-signals span:first-child { width: 100%; }
  .problem-steps { grid-template-columns: 1fr; gap: 20px; }
  .problem-steps > div { padding-left: 30px; }
  .problem-steps span { position: absolute; left: 0; top: 0; }
  .problem-steps h4 { font-size: 15px; }
  .problem-steps p { font-size: 12px; }
  .problem-detail-bottom { flex-direction: column; align-items: flex-start; gap: 18px; }
  .problem-detail-bottom > div { flex-direction: column; gap: 9px; }
  .problem-detail-bottom .btn { width: 100%; }
  .method-strip { column-gap: 23px; row-gap: 24px; }
  .method-strip h3 { font-size: 16px; margin-top: 7px; }
  .method-strip p { font-size: 12px; }
  .article-list { grid-template-columns: 1fr; }
  .footer-links { gap: 12px 20px; }
}
@media (prefers-reduced-motion: reduce) { .problem-card:hover { transform: none; } }

.record-image{max-width:160px;max-height:160px;margin:8px;border-radius:8px}.record-body textarea{width:100%;min-height:90px;margin:12px 0}[hidden]{display:none!important}

.plain-heading{border:0;padding:0;margin:0}.space-bottom{margin-bottom:45px}.space-top-small{margin-top:10px}.space-top{margin-top:24px}

.wechat-qr{display:block;width:260px;max-width:100%;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fff;text-align:center}.wechat-qr img{display:block;width:100%;height:auto}.wechat-qr span{display:block;margin-top:8px;font-size:12px;color:var(--muted)}