/* Chongqing: warm light, midnight ink and generous reading surfaces. */
.rail-shared-phrase{display:block;font-size:clamp(30px,3vw,44px);line-height:1.5;margin-bottom:12px;overflow-wrap:anywhere}.rail-voices{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px}.rail-voice-play{min-height:44px;display:inline-flex;align-items:center;gap:8px;padding:10px 14px;border:1px solid #bed5c4;border-radius:10px;color:#125c50;background:#eaf3e5;font:700 13px Manrope,sans-serif;cursor:pointer}.rail-voice-play:hover,.rail-voice-play.is-speaking{background:#0d6d5b;color:white;border-color:#0d6d5b}.rail-voice-play:focus-visible{outline:3px solid #c18a32;outline-offset:3px}
:root{--ink:#102e37;--muted:#557079;--green:#087868;--gold:#c58938;--paper:#f5f7f4;--line:#d5e0db}
body{background:radial-gradient(ellipse at 0 8%,#b9dcd966,transparent 34%),radial-gradient(ellipse at 100% 38%,#ffe0b066,transparent 35%),linear-gradient(165deg,#f3f7f5,#fbf8ef 65%,#eef5f2);color:var(--ink)}
.shell{max-width:1560px;padding-inline:clamp(20px,4.5vw,72px)}
.topbar{min-height:88px;border-bottom:1px solid #ccdad3}.brand{font-size:20px;font-weight:800}.seal{border:1px solid #369d8c;box-shadow:inset 0 1px #ffffff40,0 7px 18px #06392f25;border-radius:14px}.nav a{min-height:44px;display:inline-flex;align-items:center;color:#36535b}.nav a:hover{color:#087868}.edition-switch{background:#ffffffa6;border-color:#c6d9d1}
.hero{min-height:680px;display:flex;align-items:center;position:relative;padding:66px 60px;isolation:isolate;border:1px solid #163b47;border-radius:30px;overflow:hidden;box-shadow:0 3px 6px #092a3220,0 28px 60px #092a322b;background:#061d29;margin:24px 0 34px}
.hero>div:first-child{position:relative;z-index:3;width:53%;padding-bottom:18px}.hero .eyebrow{color:#ffd28c;font-size:11px;letter-spacing:2.7px}.hero h1{font-size:clamp(58px,6.3vw,94px);font-weight:800;line-height:1.015;letter-spacing:-5px;margin:28px 0}.hero h1 em{color:#ffda92;text-shadow:0 3px 30px #e6a24c22}.hero p{font-size:16px;line-height:1.8;max-width:390px;color:#dfebe9;text-wrap:pretty}.hero .hero-art{position:absolute;inset:0;z-index:0;border:0;border-radius:0;box-shadow:none;min-height:0;margin:0;background:#082934;overflow:hidden}.hero .hero-art img{width:100%;height:100%;min-height:0;object-fit:cover;object-position:center;filter:none}.hero .hero-art:after{inset:0;background:linear-gradient(90deg,#051c2afa 0%,#082835ef 23%,#082835ab 40%,#08283505 70%),linear-gradient(0deg,#051c2a95,transparent 35%);pointer-events:none}.hero:before{width:420px;height:420px;border:1px solid #96c6bd29;top:auto;bottom:-325px;left:20px;z-index:2}.hero:after{width:530px;height:530px;top:auto;bottom:-380px;left:-35px;border:1px solid #96c6bd15;z-index:2}.hero .actions{margin-top:30px;gap:12px}.hero .actions .btn{border-radius:12px;font-size:14px;min-height:52px}.hero .actions .btn:first-child{box-shadow:inset 0 1px #fff6,0 7px 22px #0004}.hero .stats{display:flex;gap:30px;border-top:1px solid #b2cfc43b;max-width:375px;margin-top:35px;padding-top:24px}.hero .stats strong{font-size:29px;color:#fff2d6}.hero .stats div{font-size:11px;color:#c8d9d6}.hero .floating{right:28px;left:auto;bottom:42px;max-width:310px;background:#ffffffed;padding:12px 20px;border-radius:18px;border:1px solid #fff9;transform:rotate(-2deg);box-shadow:0 2px 4px #0002,0 16px 35px #0004;backdrop-filter:blur(15px)}.hero .floating .han{font-size:40px}.hero-art .caption{left:auto;right:32px;bottom:17px;font-size:9px;color:#f8e7c7}
.path{border:1px solid #c9d9d1;background:#fffffff0;border-radius:22px;box-shadow:0 2px 4px #163a2d04,0 14px 34px #163a2d0d;margin-bottom:72px}.step{padding:28px}.step:before{height:4px}.step h3{font-size:19px;font-weight:750}.step p{font-size:13px;line-height:1.7;color:#526b70}.step>span{color:#98703a}.step:nth-child(2){background:linear-gradient(160deg,#fff9edaa,transparent)}.step:nth-child(3){background:linear-gradient(160deg,#eef8f4aa,transparent)}
.section-head{margin-top:42px}.section-head h2{font-size:clamp(30px,3vw,42px);letter-spacing:-1.5px}.section-head p{font-size:15px;line-height:1.7}.toolbar input,.toolbar select{min-height:54px;border-radius:13px;background:#fff;border:1px solid #c9d9d3;box-shadow:0 2px 3px #173e2905,0 6px 18px #173e2907}.toolbar input:focus{border-color:#188371}.slider-controls{margin:28px 0 16px}.slider-controls p{font-size:16px;color:#345e62}.slider-arrow{width:54px;height:52px;border-radius:50%;border-color:#bfd5cb;box-shadow:0 3px 6px #173e2909,0 10px 24px #173e2908}.cards.lesson-slider{border:1px solid #bfd2c8;border-radius:28px;box-shadow:0 2px 5px #123c2f08,0 22px 48px #123c2f13;background:#fff}.lesson-slider .slide-art{min-height:570px;background:#102e3b}.lesson-slider .slide-content{padding:42px 46px;background:radial-gradient(ellipse at 105% -10%,#d6eddfb3,transparent 58%),linear-gradient(145deg,#ffffff,#f7f9f3)}.slide-content h3{font-size:clamp(31px,3vw,46px);line-height:1.13;letter-spacing:-1.7px}.slide-objective p{font-size:17px;line-height:1.75;color:#3a5860}.slide-meta .lesson-index{background:#0e4d46;color:#edffef;letter-spacing:1.7px;padding:8px 13px;border:1px solid #397768}.slide-status{font-size:12px;color:#436c60}.cover-shade{background:linear-gradient(180deg,#052a2e05 35%,#062733ee)}.cover-caption{bottom:32px;left:30px}.cover-card-number{font-size:88px;color:#ffdf9c;text-shadow:0 5px 20px #0007}.cover-open{border:1px solid #fff8;background:#122c3b69;backdrop-filter:blur(14px);box-shadow:0 7px 20px #0002;padding:11px 17px}.slide-vocabulary .preview-word{background:linear-gradient(150deg,#edf6ee,#fffaf0);border:1px solid #d0dfd0;box-shadow:inset 0 1px #fff,0 3px 8px #28492e05;border-radius:14px;padding:13px}.preview-word .han{color:#124e45}.slide-open{border-radius:12px;min-height:52px;box-shadow:inset 0 1px #ffffff3b,0 5px 12px #08615020}.slide-includes{font-size:12px;line-height:1.6}.slide-reassurance{font-size:12px;line-height:1.7}.missions-link{padding-block:13px;font-size:14px}
.lesson-cover{border-radius:26px;min-height:340px;border:1px solid #183d43;box-shadow:0 2px 5px #12342c10,0 20px 40px #12342c1a}.lesson-cover h1{font-size:clamp(32px,4vw,56px);letter-spacing:-1.8px;text-shadow:0 3px 18px #0006;max-width:850px}.lesson-cover-shade{background:linear-gradient(90deg,#051c2af2,#083b3bae 55%,#083b3b38),linear-gradient(0deg,#061b29bf,transparent 80%)}.lesson-cover-number{color:#ffe0a0;text-shadow:0 3px 15px #0004}.unit-switcher{margin-top:8px}.unit-switcher>a{min-height:48px;display:inline-flex;align-items:center;justify-content:center;border:1px solid #c9dbd1;background:linear-gradient(135deg,#fff,#edf5ec);border-radius:13px;box-shadow:0 3px 10px #133b2d07}.unit-switcher select{border-radius:12px;min-height:48px}.unit-reading-summary{background:linear-gradient(95deg,#e0eee7,#faf7ea);border:1px solid #cfdfd2;border-radius:12px;padding:12px 16px}.unit-contents{border-radius:22px;border-color:#c8d9cf;padding:26px;background:radial-gradient(at 100% 0,#eff5e5,transparent 45%),#fff;box-shadow:0 2px 4px #153d2e04,0 12px 30px #153d2e07}.unit-page{border-radius:14px;min-height:138px;padding:16px;gap:8px}.unit-page.selected{padding:15px;background:linear-gradient(145deg,#dcefe3,#fff1d8);border-color:#17806c;box-shadow:inset 0 4px #17806c,0 7px 15px #1460490d}.unit-page strong{font-size:25px;color:#246353}.unit-page span{font-size:12px;line-height:1.5}.unit-page small{font-size:10px;color:#627e72;margin-top:auto}.unit-contents h2{font-size:24px}.experience-nav{background:#fafcf8f5;border:1px solid #d5e3d9;border-radius:16px;box-shadow:0 6px 18px #0e433414;backdrop-filter:blur(18px);margin-top:30px}.experience-nav a{font-size:13px;font-weight:750;color:#3a5e60;border-radius:10px}.experience-nav a:hover,.experience-nav a:focus-visible{background:#dceee4;color:#075d50}.experience-section-heading{gap:17px;margin-top:45px;margin-bottom:26px}.experience-section-heading h2{font-size:clamp(25px,2.5vw,34px);letter-spacing:-1px}.experience-section-heading p{font-size:14px;line-height:1.7}.section-number{width:47px;height:47px;border-radius:14px;background:linear-gradient(145deg,#0b6d5c,#114b4d);color:#ffe2a8;box-shadow:inset 0 1px #fff3,0 5px 12px #164b3121}.lesson-experience .comic{padding:12px;border-radius:20px;background:linear-gradient(140deg,#d6e6df,#f0dfbe);box-shadow:0 2px 3px #143b2b10,0 18px 38px #143b2b15}.aside{border-radius:20px;border-color:#cbded3;box-shadow:0 2px 5px #143b2b06,0 15px 32px #143b2b0c}.rail-helper{border-radius:18px 18px 0 0;background:linear-gradient(120deg,#d9eee1,#fff0d2)}.word-listen-label{border:1px solid #d0dfce;background:linear-gradient(145deg,#edf6e8,#e0efd7);box-shadow:inset 0 1px #fff;min-height:44px}.word-sound{max-width:100%;width:100%;justify-content:space-between}.word-sound .han{overflow-wrap:anywhere}.word-sound:hover,.word-sound.is-speaking{background:#dff0e3}.spoken-line{border-radius:18px;border:1px solid #c9dcd1;background:linear-gradient(125deg,#fff,#f9fbf5);box-shadow:0 5px 15px #113f2d06;padding:23px}.speaker-avatar{background:linear-gradient(145deg,#0b7061,#164e4a);color:#ffdf97;border:1px solid #6f9c89;box-shadow:0 4px 10px #144a3315}.speaker-name{color:#315f57;letter-spacing:1px}.line-play{border-radius:50%;background:#0e6f5f;color:#fff;border:1px solid #12624f;box-shadow:0 6px 13px #12624f24;min-width:44px;min-height:44px}.scene-card{border-radius:21px;border-color:#bed5c7;box-shadow:0 3px 6px #17432c06,0 12px 28px #17432c0c;background:#fff}.scene-description{background:radial-gradient(at 100% 100%,#ecf4e7,transparent 75%),#fff}.scene-still:after{content:'';position:absolute;inset:0;pointer-events:none;box-shadow:inset 0 -35px 35px -30px #031d2b}.scene-state{border:1px solid #fff3;backdrop-filter:blur(10px)}
.kc-a-shell{border-radius:24px!important;box-shadow:0 3px 5px #16403005,0 20px 40px #1640300c}.kc-a-task{background:linear-gradient(145deg,#fff,#fbfcf6)!important;border-color:#d0dfd1!important;border-radius:22px!important}.kc-a-option{min-height:64px;background:#fff;box-shadow:inset 0 1px #fff,0 3px 8px #19452c05;border-radius:15px!important}.kc-a-option[aria-pressed=true]{background:linear-gradient(135deg,#e2f1e4,#f1f6dc);border-color:#167b62;box-shadow:0 0 0 2px #167b6212}.progress-total{border:1px solid #2c7768;background:radial-gradient(at 100% 0,#c9974d88,transparent 60%),linear-gradient(145deg,#071f2e,#09665a);box-shadow:inset 0 1px #fff3,0 22px 45px #103d3020}.progress-lesson{border-radius:20px;padding:26px;border-color:#cbdcd0;box-shadow:0 3px 5px #123d2904,0 13px 28px #123d2909}.footer{margin-top:80px;padding-block:35px;border-top-color:#c8d9d0}
.en-hero{position:relative;isolation:isolate;overflow:hidden;min-height:390px;display:flex;flex-direction:column;justify-content:center;border:1px solid #224c52;box-shadow:0 3px 6px #092a3220,0 25px 50px #092a3220;background:linear-gradient(90deg,#041d2af5,#082835d9 45%,#08283520),url('covers/chongqing-keyart-v2.png') center/cover}.en-hero h1{max-width:650px}.en-hero p{max-width:500px}.en-page-card{border-radius:20px;box-shadow:0 3px 5px #123d2905,0 12px 26px #123d2909}.en-page-card a[aria-current]{background:linear-gradient(135deg,#dcefe4,#fff0d4);box-shadow:inset 0 4px #14775f}.en-words{background:linear-gradient(145deg,#fff,#f4f8ed);box-shadow:0 6px 17px #16482c09}.en-pending{opacity:1;background:#eff3ed;color:#5e7067}.en-words .han{font-size:42px}
button,a,input,select{touch-action:manipulation}button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #c18a32;outline-offset:4px}.btn{transition:transform .18s ease,box-shadow .18s ease}.btn:hover{transform:translateY(-2px);box-shadow:0 7px 20px #07493425}
@media(max-width:1100px){.hero{padding:45px 35px;min-height:620px}.hero>div:first-child{width:58%}.hero h1{font-size:70px}.hero .hero-art img{object-position:58% center}.hero .hero-art:after{background:linear-gradient(90deg,#051c2afa,#082835e8 30%,#08283570 55%,transparent 80%)}.hero .floating{right:20px;bottom:30px}.lesson-slider .slide-content{padding:30px}.slide-content h3{font-size:34px}}
@media(max-width:720px){.topbar{min-height:94px;flex-wrap:wrap;padding-block:12px;gap:10px}.brand{font-size:18px}.topbar .nav{display:flex;gap:14px;flex-wrap:wrap;width:100%;justify-content:space-between}.topbar .nav>a{display:inline-flex;min-height:40px;font-size:12px}.edition-switch{margin-left:auto}.hero{display:grid;grid-template-columns:1fr;padding:0;margin:18px 0 25px;border-radius:24px;min-height:0;gap:0;background:#082936}.hero>div:first-child{width:100%;padding:31px 25px 25px;z-index:2;background:radial-gradient(ellipse at 100% 0,#1673634a,transparent 65%),linear-gradient(130deg,#071d2b,#0d383f)}.hero h1{font-size:clamp(45px,11.2vw,68px);line-height:1.06;letter-spacing:-2.8px;margin:21px 0}.hero .eyebrow{font-size:9px;letter-spacing:2px}.hero p{font-size:14px;line-height:1.8;max-width:100%}.hero .actions{flex-direction:row;margin-top:23px;gap:9px}.hero .actions .btn{font-size:12px;min-height:49px;padding:12px 13px}.hero .stats{margin-top:25px;padding-top:20px;gap:26px;max-width:none}.hero .stats strong{font-size:25px}.hero .stats div{font-size:10px}.hero .hero-art{position:relative;inset:auto;width:100%;height:310px;min-height:0;z-index:1;border-top:1px solid #b6d0c22b;display:block}.hero .hero-art img{height:100%;min-height:0;object-fit:cover;object-position:74% center}.hero .hero-art:after{inset:0;background:linear-gradient(0deg,#082936ab,transparent 42%)}.hero .floating{right:16px;left:16px;bottom:35px;max-width:none;padding:10px 14px;transform:none;justify-content:flex-start;border-radius:12px;gap:13px}.hero .floating .han{font-size:30px}.hero .floating small{font-size:11px}.hero-art .caption{right:18px;bottom:12px;font-size:8px}.hero:before,.hero:after{display:none}.path{border-radius:19px;margin-bottom:46px}.step{padding:20px 17px}.step h3{font-size:16px;line-height:1.35}.step p{font-size:12px;line-height:1.7}.step>span{font-size:10px}.section-head h2{font-size:29px;letter-spacing:-1px}.section-head p{font-size:13px}.toolbar{gap:10px}.toolbar input,.toolbar select{font-size:16px;min-height:51px}.cards.lesson-slider{border-radius:23px}.lesson-slider .slide-art{min-height:300px;height:330px}.lesson-slider .slide-content{padding:25px}.slide-content h3{font-size:31px;letter-spacing:-1px}.slide-objective p{font-size:15px;line-height:1.75}.cover-caption{bottom:23px;left:24px}.cover-card-number{font-size:76px}.cover-open{right:18px;top:18px;padding:9px 12px}.preview-word .han{font-size:29px}.slide-includes{gap:9px 12px}.slider-arrow{width:48px;height:48px}.lesson-cover{border-radius:22px;min-height:285px}.lesson-cover h1{font-size:31px;line-height:1.13;letter-spacing:-1px}.lesson-cover-title{gap:14px;padding:24px!important}.lesson-cover-number{font-size:70px}.unit-contents{padding:20px;border-radius:19px}.unit-contents h2{font-size:22px}.unit-page{min-height:133px;flex-basis:118px;min-width:118px;padding:13px}.unit-page.selected{padding:12px}.unit-page strong{font-size:24px}.experience-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:4px;padding:7px;margin:25px 0 32px;border-radius:15px;overflow:visible;white-space:normal}.experience-nav a{display:flex;align-items:center;justify-content:center;text-align:center;white-space:normal;min-height:44px;padding:7px 6px;font-size:11px;line-height:1.4;background:#edf3eb}.experience-section{scroll-margin-top:124px}.experience-section-heading{margin-top:36px;gap:13px}.experience-section-heading h2{font-size:25px;line-height:1.2}.experience-section-heading p{font-size:13px}.section-number{width:41px;height:41px;flex-shrink:0;border-radius:12px}.lesson-experience .comic{padding:7px;border-radius:14px}.aside{border-radius:17px}.spoken-line{padding:18px;border-radius:17px;gap:11px}.spoken-text>.han,.spoken-sentence{font-size:30px}.speaker-avatar{width:34px;height:34px}.scene-card{border-radius:19px}.kc-a-task{border-radius:17px!important}.en-hero{min-height:360px;padding:30px 25px;background-position:60% center}.en-hero h1{font-size:39px;line-height:1.1;letter-spacing:-1.5px}.en-hero p{font-size:14px;line-height:1.7}.footer{margin-top:50px;padding-block:25px}}
.hero .floating .han{white-space:nowrap;flex:0 0 auto}.hero .floating>div{min-width:0}
@media(max-width:720px){.topbar{position:relative;min-height:111px;align-content:start;gap:8px;padding-block:12px}.topbar .brand{font-size:16px;gap:9px;min-height:40px}.topbar .seal{width:38px;height:40px;font-size:26px}.topbar .nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.topbar .nav>a{justify-content:center;border-radius:9px;background:#ffffff80;min-height:38px;font-size:11px}.topbar .edition-switch{position:absolute;right:0;top:12px;padding:3px}.topbar .edition-switch a,.topbar .edition-switch span{padding:7px 9px;font-size:11px}.hero .hero-art{order:-1;height:300px;border-top:0;border-bottom:1px solid #b6d0c22b}.hero>div:first-child{order:1;padding-top:26px}.hero .floating{left:auto;right:14px;bottom:16px;max-width:235px;padding:9px 13px}.hero .floating .han{font-size:29px}.hero .floating .py{font-size:12px}.hero .floating small{font-size:10px}.hero-art .caption{display:none}.hero h1{margin-top:18px}.hero .stats{gap:24px}.hero .hero-art:after{background:linear-gradient(0deg,#08293677,transparent 45%)} }
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

/* The complete learning-path card is a real navigation link. */
.path a.step{color:inherit;text-decoration:none;position:relative;transition:background .2s ease,box-shadow .2s ease}.path a.step:hover{background:linear-gradient(135deg,#e1f5efbb,#fff8e9aa);box-shadow:inset 0 -4px 0 #178977}.path a.step:focus-visible{outline:3px solid #168b7d;outline-offset:-5px}.step-open{position:absolute;right:24px;top:24px;font-size:23px;color:#167d70}.path a.step p{padding-right:8px}@media(prefers-reduced-motion:reduce){.path a.step{transition:none}}

.preview-words button.preview-word,.preview-words a.preview-word{font:inherit;text-align:left;color:inherit;text-decoration:none;cursor:pointer;width:100%;position:relative;transition:box-shadow .2s,background .2s,transform .2s}.preview-word-action{display:flex;align-items:center;gap:7px;margin-top:12px;color:#087c70;font-size:12px;font-weight:750}.preview-words .preview-word:hover{transform:translateY(-3px);box-shadow:0 10px 25px #12685420;background:linear-gradient(140deg,#e5f8ed,#fff8e7)}.preview-words .preview-word:focus-visible{outline:3px solid #087c70;outline-offset:3px}.preview-words .preview-word.is-speaking{background:#d8f1e6;box-shadow:0 0 0 2px #158c78}.preview-words .preview-word.is-speaking .preview-word-action{color:#075a50}@media(prefers-reduced-motion:reduce){.preview-words button.preview-word,.preview-words a.preview-word{transition:none}.preview-words .preview-word:hover{transform:none}}