:root {
  color-scheme: light;
  font-family: "Avenir Next", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #173f35;
  background: #fff7e7;
  --ink: #173f35;
  --forest: #1c4d3f;
  --moss: #5f8f70;
  --muted: #65786c;
  --paper: #fffcf4;
  --sand: #e0ddc7;
  --sun: #f2c94c;
}

* { box-sizing: border-box; }
html { overflow-x: hidden; scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; overflow-x: hidden; background: radial-gradient(circle at 8% 11%, rgba(242, 201, 76, .2), transparent 24%), radial-gradient(rgba(95, 143, 112, .13) .7px, transparent .7px), #fff7e7; background-size: auto, 17px 17px, auto; }
a { color: var(--forest); text-underline-offset: .2em; }
a:hover { color: #326f51; }
a:focus-visible { outline: 3px solid var(--sun); outline-offset: 4px; border-radius: 4px; }
::selection { background: #f2c94c; color: var(--ink); }
.skip-link { position: fixed; z-index: 50; top: 10px; left: 10px; padding: 9px 14px; border-radius: 10px; color: var(--paper); background: var(--ink); transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }

.site-header { position: sticky; z-index: 20; top: 0; border-bottom: 1px solid rgba(231, 226, 207, .86); background: rgba(255, 252, 244, .9); backdrop-filter: blur(18px); }
.site-header-inner, .site-footer-inner { max-width: 1240px; margin: auto; padding: 12px 30px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-grid; grid-template-columns: 40px auto; align-items: center; gap: 11px; text-decoration: none; color: var(--ink); }
.brand-mark { display: block; width: 40px; height: 40px; border-radius: 11px; object-fit: cover; }
.brand-copy { display: grid; gap: 1px; }
.brand-copy strong { font-family: "Yuanti SC", "PingFang SC", sans-serif; font-size: 1.08rem; letter-spacing: .02em; line-height: 1.2; }
.brand-copy small { color: var(--moss); font-size: .7rem; font-weight: 740; letter-spacing: .13em; }
.header-actions, .site-nav { display: flex; align-items: center; }
.header-actions { gap: 12px; }
.site-nav { gap: 5px; }
.site-nav a { padding: 9px 16px; border-radius: 15px 8px 14px 8px; color: #63766a; text-decoration: none; font-size: .91rem; font-weight: 780; transition: transform .22s cubic-bezier(.16, 1, .3, 1), background .22s cubic-bezier(.16, 1, .3, 1); }
.site-nav a:hover { background: #f5f0dd; }
.site-nav a[aria-current="page"] { background: var(--sun); color: var(--ink); transform: rotate(-1deg); }
.nav-download { padding: 9px 15px; border: 1px solid var(--ink); border-radius: 999px; color: var(--paper); background: var(--ink); text-decoration: none; font-size: .84rem; font-weight: 810; transition: transform .22s cubic-bezier(.16, 1, .3, 1), background .22s ease; }
.nav-download:hover { color: var(--paper); background: #2b6550; transform: translateY(-1px); }

.site-main { max-width: 1240px; margin: auto; padding: clamp(26px, 3.4vw, 48px) 30px 64px; }
.kicker { margin: 0 0 8px; color: var(--moss); font-size: .78rem; font-weight: 830; letter-spacing: .13em; }
h1, h2, p, figure { margin-top: 0; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }
h1 { font-family: "STYuanti-SC", "Yuanti SC", "PingFang SC", sans-serif; font-size: clamp(2.3rem, 4.1vw, 3.9rem); line-height: 1.12; letter-spacing: -.04em; font-weight: 850; }
.lead { max-width: 56ch; color: #526e5e; font-size: 1.02rem; line-height: 1.68; }
.support-intro { display: grid; grid-template-columns: minmax(0, .9fr) minmax(470px, 1.1fr); gap: clamp(26px, 3.2vw, 46px); align-items: center; min-height: 570px; }
.support-intro-copy { position: relative; z-index: 2; padding-top: 6px; }
.support-intro-copy h1 { margin-bottom: 14px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-top: 23px; }
.app-store-button { display: inline-flex; align-items: center; gap: 10px; min-height: 54px; padding: 8px 17px; border-radius: 15px 8px 16px 8px; color: var(--paper); background: var(--ink); text-decoration: none; box-shadow: 0 9px 19px rgba(23, 63, 53, .15); transition: transform .25s cubic-bezier(.16, 1, .3, 1), background .25s ease; }
.app-store-button:hover { color: var(--paper); background: #2b6550; transform: translateY(-2px); }
.app-store-button:active { transform: translateY(1px) scale(.99); }
.app-store-button > span:first-child { font-size: 1.72rem; line-height: 1; }
.app-store-button > span:last-child { display: grid; line-height: 1.15; }
.app-store-button small { color: inherit; font-size: .72rem; }
.app-store-button strong { font-size: 1rem; }
.text-link { font-size: .96rem; font-weight: 790; }
.store-note { margin-top: 12px; color: #758677; font-size: .82rem; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 7px; margin: 16px 0 0; padding: 0; list-style: none; }
.hero-proof li { padding: 6px 10px; border: 1px solid rgba(23, 63, 53, .12); border-radius: 999px; color: #546d5f; background: rgba(255, 252, 244, .7); font-size: .78rem; font-weight: 760; }
.contact-footer { margin-top: 38px; padding-top: 18px; border-top: 1px solid #d9d7be; color: #65786c; }
.contact-footer h2 { margin-bottom: 5px; color: #53685a; font-size: 1rem; font-weight: 760; }
.contact-footer p { margin-bottom: 5px; font-size: 1rem; line-height: 1.8; }
.contact-footer a { color: var(--forest); font-weight: 720; overflow-wrap: anywhere; }
.contact-footer small { font-size: .82rem; line-height: 1.6; }

.device-stage { position: relative; min-width: 0; min-height: 560px; margin: 0; animation: rise .75s .08s cubic-bezier(.16, 1, .3, 1) both; }
.device-stage::before { content: ""; position: absolute; inset: 10% 4% 7% 8%; border-radius: 48% 52% 44% 56% / 52% 42% 58% 48%; background: #dff3e5; transform: rotate(-4deg); }
.device-stage::after { content: ""; position: absolute; z-index: -1; width: 150px; height: 150px; right: -26px; top: 66px; border: 4px dashed rgba(242, 201, 76, .78); border-radius: 50%; }
.stage-note { position: absolute; z-index: 4; top: 8px; right: 24px; padding: 7px 12px; border-radius: 999px; color: var(--ink); background: var(--sun); font-size: .72rem; font-weight: 820; letter-spacing: .03em; transform: rotate(2deg); }
.phone-frame { overflow: hidden; border: 7px solid #183d35; border-radius: 34px; background: #eaf1f9; box-shadow: 0 20px 44px rgba(23, 63, 53, .18); }
.phone-frame img { display: block; width: 100%; height: auto; }
.phone-frame--home { position: absolute; z-index: 2; top: 54px; left: 10%; width: 39%; transform: rotate(-4deg); }
.phone-frame--world { position: absolute; z-index: 3; right: 7%; bottom: 34px; width: 34%; transform: rotate(5deg); }
.device-stage figcaption { position: absolute; z-index: 5; right: 6%; bottom: 2px; max-width: 300px; padding: 11px 15px; border: 1px solid rgba(23, 63, 53, .1); border-radius: 9px 18px 18px 9px; color: #53685a; background: rgba(255, 252, 244, .94); font-size: .8rem; font-weight: 760; line-height: 1.55; transform: rotate(-1deg); }

.product-story { margin-top: clamp(54px, 6vw, 78px); scroll-margin-top: 82px; }
.product-heading { align-items: end; margin-bottom: 20px; }
.product-heading > div { max-width: 660px; }
.product-heading h2 { margin: 0; }
.product-heading > p { max-width: 44ch; margin: 0 0 3px; color: #53685a; font-size: 1rem; line-height: 1.75; }
.experience-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(300px, .85fr); grid-template-rows: 1fr 1fr; gap: 17px; }
.experience-card { display: grid; grid-template-columns: 54px minmax(0, 1fr) minmax(118px, .42fr); gap: 17px; align-items: center; padding: 22px; overflow: hidden; border: 1px solid rgba(23, 63, 53, .08); border-radius: 18px 29px 20px 27px; }
.experience-card--lead { grid-row: 1 / 3; grid-template-columns: 58px minmax(0, 1fr) minmax(190px, .65fr); align-content: center; min-height: 310px; padding: clamp(24px, 2.6vw, 30px); background: #dff3e5; }
.experience-card--sun { background: #fff0b9; border-radius: 28px 16px 26px 18px; }
.experience-card--blue { background: #e7eef7; border-radius: 16px 26px 18px 28px; }
.card-eyebrow { margin: 0 0 6px; color: rgba(23, 63, 53, .56) !important; font-size: .73rem !important; font-weight: 830; letter-spacing: .12em; }
.feature-symbol { display: grid; place-items: center; width: 54px; height: 54px; border: 2px solid rgba(23, 63, 53, .12); border-radius: 50%; color: var(--ink); background: rgba(255, 252, 244, .72); font-family: "STYuanti-SC", "Yuanti SC", "PingFang SC", sans-serif; font-size: 1.2rem; font-weight: 850; transform: rotate(-4deg); }
.experience-card h3 { margin: 0 0 7px; font-family: "STYuanti-SC", "Yuanti SC", "PingFang SC", sans-serif; font-size: clamp(1.2rem, 1.7vw, 1.52rem); line-height: 1.32; }
.experience-card p { margin: 0; color: #52695b; font-size: .94rem; line-height: 1.65; }
.feature-art { display: block; width: 100%; max-width: 145px; height: auto; justify-self: end; filter: drop-shadow(0 10px 12px rgba(23, 63, 53, .09)); }
.experience-card--lead .feature-art { max-width: 230px; }
.feature-art--audio { transform: rotate(1.5deg); }
.feature-art--nature { transform: rotate(-2deg); }
.feature-art--map { transform: rotate(2deg); }
.task-pills { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }
.task-pills span { padding: 7px 11px; border: 1px solid rgba(23, 63, 53, .13); border-radius: 999px; color: var(--ink); background: rgba(255, 252, 244, .68); font-size: .8rem; font-weight: 780; }
.companion-showcase { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(245px, .45fr); gap: 18px; align-items: stretch; margin-top: 48px; }
.cat-companion { position: relative; display: grid; grid-template-columns: minmax(0, .88fr) minmax(0, 1.12fr); gap: 18px; align-items: center; min-height: 410px; padding: 30px 28px 12px; overflow: hidden; border-radius: 30px 14px 34px 18px; background: radial-gradient(circle at 72% 28%, rgba(255, 255, 255, .9), transparent 28%), #f5edce; }
.cat-companion::after { content: "小光的今日心情"; position: absolute; top: 23px; right: 25px; padding: 7px 11px; border: 1px solid rgba(23, 63, 53, .1); border-radius: 999px; color: #617565; background: rgba(255, 252, 244, .72); font-size: .75rem; font-weight: 760; }
.cat-copy h3 { margin: 0 0 9px; font-family: "Yuanti SC", "PingFang SC", sans-serif; font-size: clamp(1.45rem, 2vw, 1.9rem); line-height: 1.35; }
.cat-copy > p:last-child { margin-bottom: 0; color: #53685a; font-size: .96rem; line-height: 1.7; }
.cat-companion img { display: block; width: 100%; height: auto; align-self: end; }
.profile-preview { position: relative; display: flex; flex-direction: column; align-items: center; margin: 0; padding: 50px 16px 16px; overflow: hidden; border: 1px solid rgba(23, 63, 53, .09); border-radius: 15px 31px 21px 28px; background: #e5f2ec; }
.profile-preview > span { position: absolute; top: 20px; left: 22px; padding: 7px 10px; border-radius: 999px; color: var(--ink); background: #fff0b9; font-size: .76rem; font-weight: 820; transform: rotate(-2deg); }
.phone-frame--profile { width: min(148px, 76%); border-width: 4px; border-radius: 22px; box-shadow: 0 14px 28px rgba(23, 63, 53, .16); transform: rotate(3deg); }
.profile-preview figcaption { margin-top: 12px; color: #53685a; font-size: .8rem; font-weight: 690; line-height: 1.5; text-align: center; }
.download-band { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 20px; margin-top: 42px; padding: 22px 26px; border: 1px solid rgba(23, 63, 53, .1); border-radius: 24px 12px 28px 16px; color: var(--ink); background: #fff0b9; box-shadow: 8px 9px 0 rgba(242, 201, 76, .17); }
.download-band > img { display: block; border-radius: 20px; box-shadow: 0 10px 22px rgba(23, 63, 53, .14); transform: rotate(-3deg); }
.download-band .kicker { color: #88721e; }
.download-band h3 { margin: 0 0 6px; font-family: "Yuanti SC", "PingFang SC", sans-serif; font-size: clamp(1.45rem, 2.3vw, 2rem); }
.download-facts { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0; padding: 0; color: #6f642b; list-style: none; font-size: .82rem; font-weight: 690; }
.download-facts li::before { content: "✓"; margin-right: 5px; color: #39775d; font-weight: 900; }

.help-area { margin-top: clamp(54px, 6vw, 78px); }
.section-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; margin-bottom: 18px; }
.section-heading h2 { margin-bottom: 0; font-family: "Yuanti SC", "PingFang SC", sans-serif; font-size: clamp(1.65rem, 2.2vw, 2.15rem); line-height: 1.32; }
.section-heading small { color: var(--moss); font-size: .81rem; font-weight: 770; letter-spacing: .1em; }
.help-list { border-top: 2px solid var(--ink); }
.help-row { display: grid; grid-template-columns: 48px minmax(0, 248px) minmax(0, 1fr); gap: 18px; padding: 18px 0 20px; border-bottom: 1px solid #d9d7be; }
.help-index { color: #77957b; font-size: 1rem; font-weight: 820; }
.help-row h3 { margin: 0; font-size: 1.08rem; line-height: 1.45; }
.help-row p { max-width: 67ch; margin: 0; color: #53685a; font-size: 1rem; line-height: 1.68; }
.privacy-callout { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 28px; padding: 18px 22px; background: #edf2e3; border-radius: 7px 22px 20px 7px; }
.privacy-callout p { margin: 0; font-weight: 770; }
.privacy-callout a { flex: 0 0 auto; font-size: .94rem; font-weight: 810; }

.policy-layout { display: grid; grid-template-columns: minmax(0, 1fr) 258px; gap: clamp(34px, 4vw, 66px); align-items: start; }
.policy-header { max-width: 760px; margin-bottom: 28px; }
.policy-header h1 { margin-bottom: 15px; }
.policy-meta { display: block; margin-top: 16px; color: #758677; font-size: .88rem; }
.policy-section { max-width: 76ch; padding: 19px 0 15px; border-top: 1px solid #dad9c4; scroll-margin-top: 78px; }
.policy-section h2 { margin-bottom: 11px; font-family: "Yuanti SC", "PingFang SC", sans-serif; font-size: 1.43rem; line-height: 1.4; }
.policy-section p { margin-bottom: 10px; color: #475e50; font-size: 1rem; line-height: 1.74; }
.policy-section p:last-child { margin-bottom: 0; }
.policy-section a { font-weight: 740; }
.policy-rail { position: sticky; top: 28px; padding-top: 4px; }
.specimen { padding: 7px 7px 13px; border: 1px solid #e2dfc9; border-radius: 17px 24px 16px 24px; background: var(--paper); transform: rotate(1deg); box-shadow: 8px 9px 0 rgba(95, 143, 112, .14); }
.specimen img { display: block; width: 100%; height: auto; aspect-ratio: 1 / 1; object-fit: cover; border-radius: 10px 15px 8px 15px; }
.specimen figcaption { padding: 12px 7px 0; color: #667a64; font-size: .8rem; font-weight: 770; }
.policy-index { margin-top: 33px; padding: 19px 0 0; border-top: 2px solid var(--ink); }
.policy-index strong { display: block; margin-bottom: 10px; font-size: .89rem; }
.policy-index a { display: block; padding: 6px 0; color: #5b7060; font-size: .88rem; text-decoration: none; }
.policy-index a:hover { color: var(--ink); text-decoration: underline; }
.rail-help { margin-top: 24px; font-size: .88rem; color: #637661; }

.site-footer { border-top: 1px solid #e2dfca; background: var(--paper); }
.site-footer-inner { align-items: flex-start; color: #62786b; font-size: .86rem; }
.site-footer a { color: var(--ink); font-weight: 760; }
@keyframes rise { from { opacity: 0; transform: translateY(15px); } to { opacity: 1; transform: translateY(0); } }
@keyframes tabFloat { from { transform: translateY(0) rotate(-1deg); } to { transform: translateY(-3px) rotate(1deg); } }

@media (max-width: 900px) {
  .support-intro, .policy-layout { grid-template-columns: 1fr; }
  .support-intro-copy { padding-top: 0; }
  .device-stage { width: min(100%, 650px); min-height: 590px; margin: 0 auto; }
  .policy-rail { position: static; display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 32px; padding-top: 20px; }
  .policy-index { margin-top: 0; }
  .product-heading { display: block; }
  .product-heading > p { margin-top: 13px; }
  .experience-grid { grid-template-columns: 1fr 1fr; grid-template-rows: auto auto; }
  .experience-card--lead { grid-row: auto; grid-column: 1 / -1; min-height: 270px; }
  .companion-showcase { grid-template-columns: 1fr; }
  .profile-preview { min-height: 430px; }
  .phone-frame--profile { width: 165px; }
}
@media (max-width: 680px) {
  .site-header-inner, .site-footer-inner { padding: 14px 18px; }
  .site-main { padding: 28px 18px 48px; }
  .brand { grid-template-columns: 35px auto; gap: 9px; }
  .brand-mark { width: 35px; height: 35px; border-radius: 10px; }
  .brand-copy strong { font-size: .99rem; }
  .brand-copy small { font-size: .65rem; }
  .header-actions { gap: 5px; }
  .site-nav a { padding: 7px 8px; font-size: .79rem; }
  .site-nav a:first-child { display: none; }
  .nav-download { padding: 7px 10px; font-size: .76rem; }
  .support-intro { gap: 18px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 13px; }
  .contact-footer { margin-top: 32px; }
  .device-stage { min-height: min(128vw, 540px); margin-top: -4px; }
  .stage-note { right: 4px; }
  .phone-frame { border-width: 5px; border-radius: 28px; }
  .phone-frame--home { top: 54px; left: 9%; width: 39%; }
  .phone-frame--world { right: 7%; bottom: 38px; width: 34%; }
  .device-stage figcaption { right: 0; max-width: 245px; }
  .help-area { margin-top: 48px; }
  .product-story { margin-top: 48px; }
  .experience-grid { grid-template-columns: 1fr; }
  .experience-card, .experience-card--lead { grid-column: auto; min-height: 0; padding: 20px 18px; }
  .experience-card--lead { grid-row: auto; padding-top: 24px; padding-bottom: 24px; }
  .experience-card { grid-template-columns: 55px minmax(0, 1fr); gap: 14px; }
  .feature-symbol { width: 52px; height: 52px; font-size: 1.1rem; }
  .feature-art, .experience-card--lead .feature-art { grid-column: 2; width: min(62%, 178px); margin: -4px 0 -8px; }
  .companion-showcase { margin-top: 32px; }
  .cat-companion { grid-template-columns: 1fr; gap: 14px; min-height: 0; padding: 63px 21px 8px; }
  .cat-companion::after { top: 19px; left: 21px; right: auto; }
  .profile-preview { min-height: 410px; }
  .download-band { grid-template-columns: 70px minmax(0, 1fr); margin-top: 34px; padding: 21px 18px; }
  .download-band > img { width: 70px; height: 70px; border-radius: 16px; }
  .download-band .app-store-button { grid-column: 1 / -1; width: 100%; justify-content: center; }
  .section-heading small { display: none; }
  .help-row { grid-template-columns: 38px minmax(0, 1fr); gap: 5px 11px; padding: 18px 0; }
  .help-row p { grid-column: 2; }
  .privacy-callout { display: block; padding: 20px; }
  .privacy-callout a { display: inline-block; margin-top: 9px; }
  .policy-rail { display: block; padding-top: 0; }
  .specimen { max-width: 280px; }
  .policy-index { margin-top: 28px; }
}
@media (max-width: 390px) {
  .site-header-inner { gap: 10px; }
  .brand-copy small { display: none; }
  .site-nav { gap: 0; }
  .site-nav a { padding: 6px 5px; font-size: .7rem; }
  .site-nav a:nth-child(2) { display: none; }
  .device-stage { min-height: 470px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .device-stage { animation: none; }
  .site-nav a, .nav-download, .app-store-button { transition: none; }
}