/* Shiqi — warm neutral surfaces and comfortable Chinese typography. */
:root {
  color-scheme: light;
  --bg: #f5f3ef;
  --surface: #fffefa;
  --ink: #252a2d;
  --muted: #666b6d;
  --line: #deded8;
  --accent: #80643e;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans CJK SC", "Segoe UI", sans-serif;
  --mono: "Segoe UI", "Microsoft YaHei UI", sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 175px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 15px/1.85 var(--sans); -webkit-font-smoothing: antialiased; }
body.modal-open { overflow: hidden; }
button, input { font: inherit; }
button { color: inherit; cursor: pointer; border: 0; }
a { color: inherit; text-decoration: none; }
a, button, summary { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
img { max-width: 100%; }
svg { display: block; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
::selection { background: #dfd0b6; color: #252a2d; }
.shell { width: min(1180px, calc(100% - 64px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 100; top: 12px; left: 12px; padding: 10px 18px; border-radius: 8px; background: var(--ink); color: white; transform: translateY(-160%); }
.skip-link:focus { transform: none; }

.site-header, .guide-header { position: sticky; top: 0; z-index: 20; background: #f9f8f4f5; border-bottom: 1px solid var(--line); backdrop-filter: blur(18px); }
.header-inner { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 13px; flex-shrink: 0; }
.brand-mark { display: grid; place-items: center; position: relative; width: 45px; height: 45px; border-radius: 13px; background: #2b3031; color: #faf6ed; font: 600 24px/1 "Segoe UI", sans-serif; letter-spacing: -2px; padding-right: 3px; }
.brand-mark > span { position: absolute; right: 7px; bottom: 9px; font-size: 18px; color: #d6b77d; }
.brand-name { font-size: 21px; font-weight: 600; letter-spacing: 2px; line-height: 1.45; }
.brand-name > span { display: block; margin-top: 2px; color: var(--muted); font-size: 12px; font-weight: 400; letter-spacing: .4px; }
.desktop-nav { display: flex; align-items: center; gap: 30px; color: #5a6062; font-size: 14px; }
.desktop-nav a:hover, .text-link:hover { color: var(--accent); }
.header-consult { padding: 9px 17px; border: 1px solid #cfc6b8; border-radius: 999px; background: #fffdf9; font-size: 13px; white-space: nowrap; }
.header-consult > span { margin-left: 14px; color: var(--accent); }
.quick-links { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; padding-bottom: 16px; }
.quick-link { display: flex; align-items: center; gap: 12px; min-width: 0; padding: 14px 16px; border: 1px solid #e0ded7; border-radius: 13px; background: #fffefa; box-shadow: 0 3px 12px #242a2b03; transition: border-color .2s, box-shadow .2s; }
.quick-link:hover { border-color: #bfb09b; box-shadow: 0 5px 18px #282e300a; }
.quick-icon { display: grid; place-items: center; flex: none; width: 37px; height: 37px; border-radius: 11px; background: #f4ece2; color: #896748; }
.quick-icon svg { width: 22px; height: 22px; }
.quick-douyin .quick-icon { color: #786484; background: #f1edf3; }
.quick-group .quick-icon { color: #557280; background: #edf2f4; }
.quick-link > span:nth-child(2) { min-width: 0; }
.quick-link strong { display: block; font-size: 15px; font-weight: 600; line-height: 1.6; white-space: nowrap; }
.quick-link small { display: block; margin-top: 2px; font-size: 12px; line-height: 1.6; color: var(--muted); white-space: nowrap; }
.quick-arrow { margin-left: auto; font-size: 20px; color: #8b8579; }
.quick-qq { background: #303637; border-color: #303637; color: #fffdf6; }
.quick-qq small { color: #d0d2cd; }
.quick-qq .quick-icon { background: #ffffff12; color: #ead6b5; }
.quick-qq .quick-arrow { color: #e3ccaa; }
.quick-qq:hover { background: #3c4243; border-color: #3c4243; }

.guide-entry { display: flex; align-items: center; gap: 26px; margin-top: 20px; padding: 18px 23px; border: 1px solid #d8c7a9; border-radius: 14px; background: linear-gradient(110deg, #f0e7d7, #faf5eb); transition: border-color .2s; }
.guide-entry:hover { border-color: #ad8a53; }
.guide-entry-title { color: #765b31; font-size: 29px; font-weight: 600; line-height: 1.5; letter-spacing: 2px; white-space: nowrap; }
.guide-entry-copy { display: grid; gap: 2px; min-width: 0; }
.guide-entry-copy strong { font-size: 15px; font-weight: 500; color: #514b3f; }
.guide-entry-copy > span { font-size: 13px; line-height: 1.8; color: #6e6657; }
.guide-entry-action { margin-left: auto; color: #705832; font-size: 13px; white-space: nowrap; }
.guide-entry-action > span { margin-left: 16px; font-size: 21px; }
.headphone-ad { display: flex; align-items: center; justify-content: center; gap: 24px; padding: 19px 10px 0; }
.headphone-ad-button { display: inline-flex; align-items: center; justify-content: center; gap: 14px; width: 270px; max-width: calc(100% - 56px); min-height: 54px; padding: 11px 23px; border: 1px solid #c27d4c; border-radius: 999px; background: linear-gradient(115deg, #f6c98d, #edaa70); color: #47290f; font-size: 21px; font-weight: 600; line-height: 1.5; letter-spacing: 1px; box-shadow: 0 5px 18px #b17a3920; animation: headphone-breathe 1.8s ease-in-out infinite; transform-origin: center; }
.headphone-ad-icon { flex: none; width: 25px; height: 25px; }
.headphone-ad-arrow { font-size: 23px; line-height: 1; }
.headphone-ad-label { flex: none; color: #696d6c; font-size: 12px; }
.headphone-ad-button:hover, .headphone-ad-button:focus-visible { animation-play-state: paused; background: #f6c99b; }
@keyframes headphone-breathe { 0%, 100% { transform: scale(.97); box-shadow: 0 5px 18px #b17a3918; } 50% { transform: scale(1.04); box-shadow: 0 5px 25px #b17a3936; } }

.compact-intro { display: flex; justify-content: space-between; align-items: center; gap: 28px; padding-block: 30px 26px; border-bottom: 1px solid var(--line); }
.intro-eyebrow { margin: 0 0 7px !important; color: #806c50 !important; font-size: 12px !important; font-weight: 500; letter-spacing: 1.5px; }
h1 { font-size: 34px; font-weight: 600; line-height: 1.6; letter-spacing: .2px; margin: 0 0 8px; }
h1 > span { color: var(--accent); }
.compact-intro p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.95; }
.text-link { color: #766045; font-size: 14px; white-space: nowrap; }
.text-link > span { margin-left: 14px; font-size: 19px; }
.section { padding-block: 29px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 18px; }
.section-kicker { font: 500 11px/1.6 var(--sans); letter-spacing: 1.5px; color: #82715b; margin-bottom: 5px; }
.section-heading h2 { margin: 0; font-size: 25px; line-height: 1.5; font-weight: 600; letter-spacing: .4px; }
.section-heading > p, .heading-note { margin: 0; font-size: 13px; line-height: 1.85; color: var(--muted); }
.record-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.record-card { min-width: 0; overflow: hidden; border: 1px solid #ddded8; border-radius: 14px; background: #fffefa; transition: border-color .2s, box-shadow .2s; }
.record-card:hover { border-color: #b8aa95; box-shadow: 0 8px 22px #2c33300b; }
.record-card > a { display: block; }
.record-card-image { position: relative; overflow: hidden; background: #eae8e2; }
.record-card-image > img { display: block; width: 100%; height: auto; aspect-ratio: 1.86; object-fit: cover; transition: transform .25s; }
.record-card:hover img { transform: scale(1.025); }
.record-card-image > span { position: absolute; right: 10px; bottom: 10px; display: grid; place-items: center; width: 28px; height: 28px; border: 1px solid #ffffff80; border-radius: 50%; background: #f9f7eeeb; color: #514939; font-size: 18px; }
.record-card-copy { padding: 13px 16px; }
.record-card h3 { margin: 0; font-size: 15px; line-height: 1.8; font-weight: 500; }
.record-card h3 > span { margin-left: 10px; color: var(--muted); font-size: 13px; font-weight: 400; }
.record-note { margin: 11px 0 0; font-size: 12px; line-height: 1.9; color: var(--muted); }
.flashing-section, .questions-section { border-top: 1px solid var(--line); }
.service-preparation { margin: 0 0 18px; padding: 15px 18px; border: 1px solid #ddded7; border-radius: 12px; background: #eeeee7; }
.service-preparation p { display: flex; align-items: baseline; gap: 16px; margin: 0; color: #5b625c; font-size: 14px; line-height: 1.95; }
.service-preparation p + p { margin-top: 8px; }
.service-preparation strong { flex: none; color: #505a4a; font-weight: 600; }
.service-preparation p > span { min-width: 0; overflow-wrap: anywhere; }
.package-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.package-card { min-width: 0; padding: 23px 24px 0; border: 1px solid #d8d7cf; border-radius: 16px; background: #fffefa; box-shadow: 0 5px 20px #30352e04; }
.package-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.package-top .section-kicker { margin: 0; font-size: 11px; letter-spacing: 1px; }
.package-index { color: #85775f; font: 500 13px/1.5 var(--sans); }
.package-card h3 { margin: 0; font-size: 24px; font-weight: 600; line-height: 1.6; }
.package-features { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; list-style: none; margin: 19px 0; padding: 0; }
.package-features > li { display: flex; align-items: center; justify-content: center; min-height: 39px; padding: 4px 2px; border: 1px solid #e0e2db; border-radius: 7px; background: #f5f6f1; color: #50594c; font-size: 14px; line-height: 1.55; white-space: nowrap; }
.package-features > .feature-primary { border-color: #d9c7a9; background: #f4ecdd; color: #715832; font-weight: 500; }
.package-features > .feature-port { flex-wrap: wrap; gap: 0 4px; }
.feature-port > span { white-space: nowrap; }
.card-action { display: flex; align-items: center; justify-content: space-between; gap: 12px; width: 100%; padding: 14px 0; border-top: 1px solid var(--line); background: none; color: #775e3e; text-align: left; font-size: 14px; }
.card-action > span { font-size: 23px; }
.card-action:hover { color: #392d1b; }
.system-adaptation { display: flex; justify-content: space-between; align-items: center; gap: 26px; margin-top: 16px; padding: 21px 24px; border: 1px solid var(--line); border-radius: 14px; background: #eceee8; }
.adaptation-copy .section-kicker { display: none; }
.adaptation-copy h3 { margin: 0 0 7px; font-size: 19px; line-height: 1.7; font-weight: 600; }
.adaptation-copy p { margin: 0; font-size: 14px; line-height: 1.95; color: #60665d; }
.package-note { display: flex; align-items: baseline; gap: 8px; margin: 12px 0 0; color: var(--muted); font-size: 12px; line-height: 1.9; }
.package-note > span { color: var(--accent); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 22px; min-height: 46px; padding: 11px 18px; border: 1px solid transparent; border-radius: 9px; font-size: 14px; line-height: 1.7; font-weight: 500; }
.button > span { font-size: 21px; line-height: 1; }
.button-outline { background: #fffdf7; border-color: #c7c1b5; color: #625139; white-space: nowrap; }
.button-outline:hover { background: #f4ead8; border-color: #ab9271; }
.button-accent { background: #303637; color: #fffaf1; }
.button-accent:hover { background: #454c4d; }
.button-full { display: flex; justify-content: space-between; width: 100%; }
.faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
details { border: 1px solid var(--line); border-radius: 12px; background: #fffefa; }
summary { display: flex; justify-content: space-between; align-items: center; gap: 18px; min-height: 56px; padding: 13px 18px; list-style: none; cursor: pointer; font-size: 15px; line-height: 1.8; }
summary::-webkit-details-marker { display: none; }
.faq-plus { color: #897252; font-size: 23px; line-height: 1; flex: none; }
details[open] .faq-plus { transform: rotate(45deg); }
details > p { margin: 0; padding: 0 18px 18px; color: var(--muted); font-size: 14px; line-height: 1.95; }
.consult-inline { display: flex; align-items: center; gap: 20px; margin-top: 16px; padding: 15px 18px; border: 1px solid #d4d8cf; border-radius: 12px; background: #ebece5; color: #5c6558; font-size: 14px; }
.consult-inline strong { color: #323b31; font-weight: 500; }
.consult-inline button { padding: 5px 0; background: none; color: #5c4d36; font-size: 14px; }
.consult-inline button:first-of-type { margin-left: auto; }
.consult-inline button:last-child { color: #353b34; font-weight: 500; }
.site-footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; min-height: 75px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.footer-brand { color: #4a514a; font-size: 16px; font-weight: 500; }
.back-top > span { margin-left: 10px; }

.contact-dialog, .record-dialog { width: min(490px, calc(100% - 32px)); max-height: calc(100% - 32px); overflow: auto; padding: 27px; border: 1px solid #d8d4c9; border-radius: 18px; background: #fbfaf5; color: var(--ink); box-shadow: 0 24px 90px #1e26243d; }
.contact-dialog::backdrop, .record-dialog::backdrop { background: #222b2970; backdrop-filter: blur(8px); }
.dialog-top, .record-dialog-top { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.dialog-top .section-kicker, .record-dialog-top .section-kicker { margin: 0; }
.dialog-close { display: grid; place-items: center; width: 35px; height: 35px; border: 1px solid #d5d5ca; border-radius: 8px; background: #f1f0e9; color: #61685c; font-size: 27px; line-height: 1; }
.contact-dialog h2 { margin: 15px 0 10px; font-size: 26px; line-height: 1.6; font-weight: 600; }
.dialog-description { margin: 0 0 19px; color: var(--muted); font-size: 14px; line-height: 1.95; }
.dialog-qq { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-bottom: 18px; color: #74715e; font-size: 14px; }
.dialog-qq > strong { color: #3e453b; font: 500 26px/1.5 "Segoe UI", sans-serif; letter-spacing: .5px; }
.qq-copy-link { display: block; width: 100%; min-height: 43px; margin-top: 6px; background: none; color: #725c40; font-size: 14px; }
.qq-copy-link:hover { color: #3e3324; }
.dialog-social-links { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 12px; }
.social-profile { display: flex; align-items: center; gap: 10px; min-width: 0; padding: 12px; border: 1px solid #dddfd5; border-radius: 10px; background: #f0f1e9; }
.social-profile:last-child:nth-child(odd) { grid-column: 1 / -1; }
.social-profile-icon { flex: none; font-size: 21px; color: #6a715a; }
.social-profile-copy { min-width: 0; }
.social-profile-copy > strong { display: block; font-size: 13px; font-weight: 500; }
.social-profile-copy > span { display: block; margin-top: 3px; color: #6f7569; font-size: 12px; }
.social-profile-arrow { margin-left: auto; color: #817256; font-size: 18px; }
.device-template { padding: 17px; margin-top: 20px; border: 1px solid #d9dbd0; border-radius: 10px; background: #eeefe8; }
.device-template > span { color: #626c58; font-size: 13px; }
.device-template p { white-space: pre-line; margin: 12px 0; color: #555e4e; font-size: 14px; line-height: 1.95; }
.template-copy { padding: 0; background: none; color: #725d3e; font-size: 13px; }
.template-copy > span { margin-left: 12px; }
.site-toast { position: fixed; z-index: 100; bottom: 22px; left: 50%; transform: translateX(-50%); width: max-content; max-width: calc(100% - 32px); padding: 13px 19px; border: 1px solid #4b5648; border-radius: 12px; background: #364131; color: #fffdf4; box-shadow: 0 8px 30px #26302326; font-size: 14px; }
.contact-dialog .site-toast { position: static; transform: none; width: 100%; max-width: none; margin-top: 12px; box-shadow: none; }
.clipboard-fallback { position: fixed; top: 0; left: 0; opacity: 0; pointer-events: none; }
.record-dialog { width: min(1080px, calc(100% - 32px)); }
.record-dialog h2 { margin: 12px 0 18px; font-size: 23px; font-weight: 600; line-height: 1.7; }
.record-dialog-stage { display: grid; place-items: center; min-height: 120px; overflow: hidden; border: 1px solid #d8dbcf; border-radius: 10px; background: #e8ebe1; }
.record-dialog-stage > img { display: block; width: 100%; height: auto; max-height: 65vh; object-fit: contain; }
.record-dialog-bottom { display: flex; align-items: center; gap: 14px; margin-top: 16px; }
.record-page-button { width: 43px; height: 42px; border: 1px solid #c9cdbf; border-radius: 8px; background: #eceee4; color: #565f4b; font-size: 22px; }
#record-dialog-count { min-width: 40px; text-align: center; font-size: 13px; color: #67705d; }
#record-original { margin-left: auto; font-size: 13px; color: #766044; }

/* The manual shares the same readable type scale and quiet palette. */
.guide-document { scroll-padding-top: 96px; }
.guide-page { font-size: 16px; }
.guide-shell { width: min(1100px, calc(100% - 64px)); margin-inline: auto; }
.guide-header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 76px; }
.guide-back { color: #735e40; font-size: 14px; }
.guide-back span { margin-left: 15px; }
.guide-hero { padding: 36px 0 31px; border-bottom: 1px solid var(--line); }
.guide-eyebrow { margin: 0 0 12px; color: #837258; font-size: 12px; font-weight: 500; line-height: 1.7; letter-spacing: 1.5px; }
.guide-hero h1 { margin: 0; color: #755b35; font-size: 44px; font-weight: 600; line-height: 1.5; letter-spacing: 2px; }
.guide-hero h1 > span { display: block; margin-top: 8px; color: var(--ink); font-size: 24px; font-weight: 500; letter-spacing: .4px; }
.guide-lead { margin: 21px 0 9px; color: #4e5849; font-size: 18px; line-height: 1.95; }
.guide-intro { max-width: 790px; margin: 0; color: var(--muted); line-height: 1.95; }
.guide-hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 22px; margin-top: 22px; }
.guide-text-link { color: #775e3c; font-size: 14px; line-height: 1.9; }
.guide-text-link:hover, .guide-back:hover { color: #3e3020; }
.guide-layout { display: grid; grid-template-columns: 205px minmax(0, 1fr); gap: 34px; padding-top: 30px; }
.guide-toc { display: grid; gap: 4px; align-self: start; position: sticky; top: 105px; }
.guide-toc-label { margin-bottom: 8px; color: #79715f; font-size: 13px; font-weight: 500; }
.guide-toc > a { padding: 10px 0; color: #646b5e; font-size: 14px; line-height: 1.8; }
.guide-toc > a > span { margin-right: 9px; color: #8e7d60; font-size: 12px; }
.guide-toc > a:hover { color: var(--accent); }
.guide-toc .guide-toc-secondary { margin-top: 8px; border-top: 1px solid var(--line); font-size: 13px; }
.guide-body { min-width: 0; }
.guide-section { margin-bottom: 30px; padding-bottom: 30px; border-bottom: 1px solid var(--line); scroll-margin-top: 100px; }
.guide-section-heading { display: flex; align-items: center; gap: 15px; margin-bottom: 21px; }
.guide-step-number { display: grid; place-items: center; flex: none; width: 47px; height: 47px; border: 1px solid #d4c7b0; border-radius: 12px; background: #eee6d6; color: #775c35; font-size: 18px; }
.guide-section-heading p { margin: 0 0 4px; color: #81735b; font-size: 11px; line-height: 1.6; letter-spacing: 1px; }
.guide-section h2, .guide-mail h2 { margin: 0; font-size: 25px; font-weight: 600; line-height: 1.65; }
.guide-section > p { font-size: 15px; color: var(--muted); line-height: 2; }
.guide-requirements { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.guide-requirements > div { padding: 20px; border: 1px solid var(--line); border-radius: 13px; background: #fffefa; }
.guide-label { color: #7a6d55; font-size: 12px; letter-spacing: .5px; }
.guide-requirements h3 { margin: 8px 0; font-size: 19px; font-weight: 500; line-height: 1.65; }
.guide-requirements p { margin: 0; color: var(--muted); font-size: 14px; line-height: 2; }
.cable-guide { display: flex; align-items: center; justify-content: center; gap: 20px; margin: 15px 0; padding: 24px; border: 1px solid #d8ddce; border-radius: 13px; background: #ebeee5; }
.cable-end { display: grid; justify-items: center; gap: 7px; min-width: 115px; }
.cable-end strong { font-size: 14px; font-weight: 500; }
.cable-end small { color: #6d7662; font-size: 12px; }
.port-a { display: block; width: 39px; height: 22px; border: 3px solid #7e896d; border-radius: 2px; box-shadow: inset 0 -5px #c9d2b9; }
.port-c { display: block; width: 39px; height: 20px; border: 3px solid #7e896d; border-radius: 14px; box-shadow: inset 0 -3px #c9d2b9; }
.cable-line { position: relative; flex: 1; max-width: 180px; height: 2px; background: #9aa28e; }
.cable-line::after { content: ""; position: absolute; right: -1px; top: -4px; width: 8px; height: 8px; border-top: 2px solid #9aa28e; border-right: 2px solid #9aa28e; transform: rotate(45deg); }
.cable-line > span { position: absolute; top: 10px; left: 50%; transform: translateX(-50%); color: #69755c; font-size: 12px; white-space: nowrap; }
.guide-note { margin-top: 17px; padding: 16px 18px; border-left: 3px solid #b29257; border-radius: 0 10px 10px 0; background: #ede5d5; }
.guide-note strong { color: #73572d; font-size: 15px; font-weight: 600; }
.guide-note p { margin: 6px 0 0; color: #6a604f; font-size: 14px; line-height: 2; }
.guide-details { margin-top: 13px; background: #fffefa; }
.guide-details summary { min-height: 55px; font-size: 15px; }
.guide-details > div { padding: 0 19px 18px; color: var(--muted); font-size: 14px; line-height: 2; }
.guide-details ul, .guide-details ol { padding-left: 20px; margin: 0; }
.guide-details li + li { margin-top: 8px; }
.guide-details div > p { margin: 10px 0 0; }
.guide-instructions { display: grid; gap: 23px; list-style: none; counter-reset: steps; padding: 0; margin: 0; }
.guide-instructions > li { counter-increment: steps; position: relative; padding-left: 34px; }
.guide-instructions > li::before { content: counter(steps); display: grid; place-items: center; position: absolute; left: 0; top: 3px; width: 23px; height: 23px; border: 1px solid #c9cdbd; border-radius: 50%; background: #ebeee2; color: #647050; font-size: 12px; }
.guide-instructions strong { font-size: 17px; font-weight: 500; }
.guide-instructions p { margin: 8px 0; color: var(--muted); font-size: 15px; line-height: 2; }
.guide-instructions .button { margin-top: 6px; }
.remote-code-demo { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 21px; margin-top: 23px; border: 1px solid #d1d8c6; border-radius: 13px; background: #e9eee0; }
.remote-code-demo strong { display: block; margin: 6px 0; font-size: 17px; font-weight: 500; }
.remote-code-demo p { margin: 0; font-size: 14px; color: #5f6e4f; }
.remote-code-placeholder { color: #7a8b65; font-size: 22px; letter-spacing: 3px; white-space: nowrap; }
.guide-section .guide-small, .guide-small { color: #6f7567; font-size: 13px; line-height: 1.9; margin: 10px 0 0; }
.guide-checklist { padding: 20px; border: 1px solid #d1d7c7; border-radius: 13px; background: #edf0e6; }
.guide-checklist-heading { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-bottom: 12px; }
.guide-checklist-heading strong { font-size: 17px; font-weight: 500; }
.guide-checklist-heading > span { font-size: 13px; color: #65734f; white-space: nowrap; }
.guide-checklist > label { display: flex; align-items: flex-start; gap: 12px; padding: 12px 0; color: #5a6650; font-size: 15px; line-height: 1.95; cursor: pointer; }
.guide-checklist > label + label { border-top: 1px solid #d3dbca; }
.guide-checklist input { flex: none; width: 18px; height: 18px; margin: 6px 0 0; accent-color: #66754d; cursor: pointer; }
.guide-checklist input:checked + span { color: #36452a; }
.guide-finish { margin-top: 24px; }
.guide-finish h3 { margin: 0; color: #4c5c3d; font-size: 19px; font-weight: 500; line-height: 1.95; }
.guide-finish > p { margin: 10px 0; color: var(--muted); font-size: 15px; line-height: 2; }
.guide-contact-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 19px; }
.guide-finish .guide-small { color: #6d7563; font-size: 13px; }
.guide-section .guide-session-note { margin: 19px 0 0; color: #6f7567; font-size: 14px; line-height: 2; }
.guide-mail { padding: 23px; margin-bottom: 34px; border: 1px solid #d8dbcf; border-radius: 14px; background: #edeee7; scroll-margin-top: 100px; }
.guide-mail h2 { font-size: 23px; margin-top: 7px; }
.guide-mail p { margin: 10px 0 15px; color: var(--muted); font-size: 15px; line-height: 2; }
.guide-footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-block: 25px; border-top: 1px solid var(--line); color: #6b7166; font-size: 12px; }
.guide-footer > a:first-child { color: #515d46; }
.guide-page main:focus { outline: none; }
.not-found-page { min-height: 100dvh; display: grid; place-items: center; padding: 24px; }
.not-found-card { max-width: 540px; text-align: center; }
.not-found-card h1 { margin: 8px 0; font: 500 96px/1.4 "Segoe UI", sans-serif; color: #7a6544; }
.not-found-card p { color: var(--muted); margin: 0 0 24px; font-size: 15px; }

@media (max-width: 1000px) {
  .shell, .guide-shell { width: calc(100% - 40px); }
  .desktop-nav { gap: 20px; }
  .quick-link { padding: 12px; gap: 10px; }
  .quick-link strong { font-size: 14px; }
  .quick-link small { font-size: 12px; }
  .quick-icon { width: 31px; height: 35px; }
  .quick-arrow { display: none; }
  .compact-intro { display: block; }
  .compact-intro .text-link { display: inline-block; margin-top: 10px; }
  h1 { font-size: 31px; }
  .record-card h3 > span { display: block; margin-left: 0; }
  .package-card { padding-inline: 18px; }
  .package-features > li { font-size: 13px; }
  .system-adaptation { gap: 20px; padding-inline: 20px; }
  .system-adaptation > .button { gap: 14px; font-size: 13px; }
  .guide-layout { grid-template-columns: 180px minmax(0, 1fr); gap: 24px; }
  .guide-requirements { grid-template-columns: 1fr; }
  .remote-code-demo { flex-direction: column; align-items: flex-start; gap: 12px; }
  .cable-guide { padding-inline: 17px; gap: 12px; }
  .cable-end { min-width: 100px; }
}
@media (max-width: 720px) {
  html { scroll-padding-top: 205px; }
  .shell, .guide-shell { width: calc(100% - 32px); }
  .header-inner { height: 66px; gap: 12px; }
  .brand { gap: 10px; }
  .brand-mark { width: 39px; height: 39px; border-radius: 11px; font-size: 22px; }
  .brand-mark > span { right: 6px; bottom: 8px; font-size: 16px; }
  .brand-name { font-size: 19px; letter-spacing: 1px; }
  .brand-name > span { font-size: 11px; letter-spacing: 0; }
  .desktop-nav { display: none; }
  .header-consult { padding: 7px 12px; font-size: 12px; }
  .header-consult > span { margin-left: 8px; }
  .quick-links { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; padding-bottom: 12px; }
  .quick-link { gap: 10px; min-height: 49px; padding: 8px 11px; border-radius: 10px; }
  .quick-icon { width: 29px; height: 29px; border-radius: 8px; }
  .quick-icon svg { width: 19px; height: 19px; }
  .quick-link strong { font-size: 14px; line-height: 1.8; }
  .quick-link small { display: none; }
  .guide-entry { flex-wrap: wrap; gap: 6px 15px; padding: 15px 17px; margin-top: 15px; border-radius: 12px; }
  .guide-entry-title { font-size: 26px; letter-spacing: 1px; }
  .guide-entry-copy { order: 3; flex-basis: 100%; gap: 0; }
  .guide-entry-copy strong { font-size: 14px; }
  .guide-entry-copy > span { font-size: 13px; }
  .guide-entry-action { font-size: 12px; }
  .guide-entry-action > span { margin-left: 8px; font-size: 20px; }
  .headphone-ad { gap: 20px; padding: 17px 7px 0; }
  .headphone-ad-button { width: 224px; min-height: 51px; padding: 10px 18px; gap: 11px; font-size: 20px; }
  .headphone-ad-icon { width: 23px; height: 23px; }
  .headphone-ad-label { font-size: 12px; }
  .compact-intro { padding-block: 24px 22px; }
  h1 { font-size: 27px; line-height: 1.65; letter-spacing: 0; }
  .compact-intro h1 > span { display: block; }
  .compact-intro p { font-size: 14px; line-height: 1.95; }
  .compact-intro .text-link { margin-top: 9px; font-size: 13px; }
  .section { padding-block: 24px; }
  .section-heading { align-items: center; gap: 14px; margin-bottom: 15px; }
  .section-heading h2 { font-size: 23px; }
  .section-kicker { font-size: 10px; letter-spacing: 1px; }
  .section-heading > p, .heading-note { max-width: 135px; font-size: 12px; line-height: 1.8; }
  .record-grid { gap: 9px; }
  .record-card { border-radius: 10px; }
  .record-card-image > span { right: 5px; bottom: 5px; width: 22px; height: 22px; font-size: 15px; }
  .record-card-copy { padding: 9px 8px; }
  .record-card h3 { font-size: 13px; line-height: 1.8; }
  .record-card h3 > span { font-size: 12px; line-height: 1.8; }
  .record-note { margin-top: 10px; font-size: 12px; }
  .service-preparation { padding: 14px 15px; margin-bottom: 14px; }
  .service-preparation p { display: block; font-size: 14px; line-height: 1.95; }
  .service-preparation strong { display: block; margin-bottom: 3px; }
  .service-preparation p + p { margin-top: 12px; }
  .package-grid { grid-template-columns: 1fr; gap: 14px; }
  .package-card { padding: 18px 18px 0; border-radius: 14px; }
  .package-top { margin-bottom: 7px; }
  .package-top .section-kicker { font-size: 11px; letter-spacing: .6px; }
  .package-card h3 { font-size: 23px; }
  .package-features { gap: 7px; margin: 15px 0; }
  .package-features > li { min-height: 39px; font-size: 13px; }
  .card-action { font-size: 14px; padding-block: 13px; }
  .system-adaptation { display: block; padding: 18px; margin-top: 14px; }
  .adaptation-copy h3 { font-size: 18px; }
  .adaptation-copy p { font-size: 14px; }
  .system-adaptation > .button { margin-top: 14px; }
  .package-note { font-size: 12px; }
  .faq-list { grid-template-columns: 1fr; gap: 12px; }
  summary { font-size: 15px; padding-inline: 16px; }
  details > p { padding-inline: 16px; font-size: 14px; }
  .consult-inline { flex-wrap: wrap; gap: 10px 18px; padding: 14px 16px; font-size: 14px; }
  .consult-inline > span { flex-basis: 100%; }
  .consult-inline button { font-size: 14px; }
  .consult-inline button:first-of-type { margin-left: 0; }
  .consult-inline button:last-child { margin-left: auto; }
  .site-footer { flex-wrap: wrap; min-height: 76px; gap: 8px 15px; padding-block: 17px; font-size: 12px; }
  .site-footer > span { order: 3; flex-basis: 100%; }
  .back-top { margin-left: auto; }
  .contact-dialog, .record-dialog { width: calc(100% - 24px); max-height: calc(100% - 24px); padding: 20px; border-radius: 14px; }
  .contact-dialog h2 { font-size: 25px; }
  .dialog-qq > strong { font-size: 24px; }
  .social-profile { gap: 7px; padding: 10px; }
  .social-profile-icon { font-size: 18px; }
  .social-profile-arrow { display: none; }
  .social-profile-copy > strong { font-size: 13px; }
  .social-profile-copy > span { font-size: 12px; }
  .record-dialog h2 { font-size: 21px; }
  .record-dialog-bottom { gap: 9px; flex-wrap: wrap; }
  #record-original { font-size: 12px; }
  .guide-document { scroll-padding-top: 85px; }
  .guide-header-inner { height: 66px; gap: 12px; }
  .guide-back { font-size: 13px; }
  .guide-back span { margin-left: 7px; }
  .guide-hero { padding: 28px 0 25px; }
  .guide-eyebrow { font-size: 11px; letter-spacing: 1px; }
  .guide-hero h1 { font-size: 35px; letter-spacing: 1px; }
  .guide-hero h1 > span { margin-top: 7px; font-size: 21px; letter-spacing: 0; }
  .guide-lead { margin-top: 18px; font-size: 16px; }
  .guide-intro { font-size: 15px; }
  .guide-hero-actions { gap: 13px; margin-top: 18px; }
  .guide-text-link { font-size: 14px; }
  .guide-layout { display: block; padding-top: 23px; }
  .guide-toc { position: static; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 27px; }
  .guide-toc-label { grid-column: 1 / -1; margin-bottom: 3px; font-size: 13px; }
  .guide-toc > a { padding: 10px 11px; border: 1px solid var(--line); border-radius: 9px; background: #fffefa; font-size: 13px; }
  .guide-toc > a > span { font-size: 11px; margin-right: 4px; }
  .guide-toc .guide-toc-secondary { grid-column: 1 / -1; margin: 0; text-align: center; font-size: 13px; }
  .guide-section { margin-bottom: 26px; padding-bottom: 26px; scroll-margin-top: 88px; }
  .guide-section-heading { gap: 12px; margin-bottom: 18px; }
  .guide-step-number { width: 40px; height: 43px; border-radius: 10px; font-size: 16px; }
  .guide-section-heading p { font-size: 10px; letter-spacing: .6px; }
  .guide-section h2 { font-size: 22px; }
  .guide-requirements > div { padding: 18px; }
  .guide-requirements h3 { font-size: 19px; }
  .guide-requirements p { font-size: 15px; }
  .cable-guide { padding: 21px 10px 24px; gap: 10px; }
  .cable-end { min-width: 86px; gap: 7px; }
  .cable-end strong { font-size: 13px; }
  .cable-end small { font-size: 11px; }
  .cable-line > span { font-size: 10px; }
  .guide-note { padding: 14px 15px; }
  .guide-note p { font-size: 14px; }
  .guide-details summary { padding-inline: 15px; gap: 12px; font-size: 15px; }
  .guide-details > div { padding-inline: 16px; font-size: 15px; }
  .guide-instructions > li { padding-left: 32px; }
  .guide-instructions p { font-size: 15px; }
  .remote-code-demo { padding: 18px; margin-top: 19px; }
  .remote-code-demo strong { font-size: 16px; }
  .guide-checklist { padding: 16px; }
  .guide-checklist-heading { gap: 8px; }
  .guide-checklist-heading strong { font-size: 16px; }
  .guide-checklist-heading > span { font-size: 12px; }
  .guide-checklist > label { font-size: 15px; gap: 10px; }
  .guide-finish h3 { font-size: 18px; }
  .guide-contact-actions { gap: 9px; }
  .guide-contact-actions > .button { font-size: 13px; padding-inline: 13px; gap: 12px; }
  .guide-mail { padding: 18px; margin-bottom: 26px; scroll-margin-top: 88px; }
  .guide-mail h2 { font-size: 22px; }
  .guide-footer { flex-wrap: wrap; gap: 10px; padding-block: 21px; font-size: 12px; }
  .guide-footer > span { order: 3; flex-basis: 100%; }
  .guide-footer > a:last-child { margin-left: auto; }
}
@media (max-width: 350px) {
  .shell, .guide-shell { width: calc(100% - 24px); }
  .quick-link { padding-inline: 8px; gap: 8px; }
  .quick-link strong { font-size: 13px; }
  .record-grid { gap: 7px; }
  .record-card-copy { padding-inline: 6px; }
  .record-card h3 { font-size: 12px; }
  .package-card { padding-inline: 15px; }
  .package-features { gap: 6px; }
  .package-features > .feature-port { flex-direction: column; line-height: 1.3; }
  .guide-toc > a { padding-inline: 8px; font-size: 12px; }
  .guide-toc > a > span { font-size: 10px; margin-right: 2px; }
  .guide-checklist-heading { align-items: flex-start; flex-direction: column; gap: 2px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}