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12px;font-size:.72rem}.nav-link:after{left:8px;right:8px}.logo-img{height:35px}.hero-layout{padding-top:30px}.hero-copy h1{font-size:clamp(1.85rem,7.5vw,2.45rem);line-height:1.08;word-break:break-word}.hero-lead{font-size:.94rem}.hero-actions{align-items:stretch;flex-direction:column}.landing-btn{width:100%}.hero-proof-row{grid-template-columns:1fr}.hero-proof-row>div{background:#ffffffb8;border-radius:10px;padding:8px 10px}.hero-visual{min-height:330px}.hero-preview-shell{width:calc(100% - 14px);padding:15px;transform:none}.hero-chinese-mark{font-size:1.65rem;top:12px}.formula-cloud,.hero-note{display:none}.brand-intro,.landing-section{padding:38px 0}.brand-pillars,.persona-grid,.steps-grid,.subject-grid{grid-template-columns:1fr}.brand-pillars>div{min-height:104px}.persona-card,.step-card{min-height:auto}.hsk-level-grid{grid-template-columns:repeat(2,1fr)}.test-number-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.test-number{font-size:.68rem;min-height:42px}.student-info-grid{grid-template-columns:1fr}.selection-panel,.student-panel{padding:18px}.subject-card{min-height:210px}.final-cta-inner{align-items:stretch;flex-direction:column}}